External:Mesh Generation Articles In Journals - Revision history

Ctsolakis: /* 2018 */

2019-03-11T18:36:47Z

2018

← Older revision		Revision as of 13:36, 11 March 2019
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	#:'''Darren Engwirda'''<pre> Abstract: The generation of high-quality staggered unstructured grids is considered, leading to the development of a new optimisation-based strategy designed to construct weighted ‘Regular-Power’ tessellations appropriate for co-volume type numerical discretisation techniques. This new framework aims to extend the conventional Delaunay–Voronoi primal-dual structure; seeking to assemble generalised orthogonal tessellations with enhanced geometric quality. The construction of these grids is motivated by the desire to improve the performance and accuracy of numerical methods based on unstructured co-volume type schemes, including various staggered grid techniques for the simulation of fluid dynamics and hyperbolic transport. In this study, a new hybrid optimisation strategy is proposed; seeking to optimise the geometry, topology and weights associated with general, two-dimensional Regular-Power tessellations using a combination of gradient-ascent and energy-based techniques. The performance of this new method is tested experimentally, with a range of complex, multi-resolution primal-dual grids generated for various coastal and regional ocean modelling applications.		#:'''Darren Engwirda'''<pre> Abstract: The generation of high-quality staggered unstructured grids is considered, leading to the development of a new optimisation-based strategy designed to construct weighted ‘Regular-Power’ tessellations appropriate for co-volume type numerical discretisation techniques. This new framework aims to extend the conventional Delaunay–Voronoi primal-dual structure; seeking to assemble generalised orthogonal tessellations with enhanced geometric quality. The construction of these grids is motivated by the desire to improve the performance and accuracy of numerical methods based on unstructured co-volume type schemes, including various staggered grid techniques for the simulation of fluid dynamics and hyperbolic transport. In this study, a new hybrid optimisation strategy is proposed; seeking to optimise the geometry, topology and weights associated with general, two-dimensional Regular-Power tessellations using a combination of gradient-ascent and energy-based techniques. The performance of this new method is tested experimentally, with a range of complex, multi-resolution primal-dual grids generated for various coastal and regional ocean modelling applications.
	#:</pre>		#:</pre>
	#A parallel direct cut algorithm for high-order overset methods with application to a spinning golf ball ,[https://www.sciencedirect.com/science/article/pii/S0021999118303450]		# A parallel direct cut algorithm for high-order overset methods with application to a spinning golf ball, [https://www.sciencedirect.com/science/article/pii/S0021999118303450]
	#: '''J.Crabill, F.D.Witherden, A.Jameson ''' <pre> Abstract :		#: '''J.Crabill, F.D.Witherden, A.Jameson '''<pre> Abstract : Overset methods are commonly employed to enable the effective simulation of problems involving complex geometries and moving objects such as rotorcraft. This paper presents a novel overset domain connectivity algorithm based upon the direct cut approach suitable for use with GPU-accelerated solvers on high-order curved grids. In contrast to previous methods it is capable of exploiting the highly data-parallel nature of modern accelerators. Further, the approach is also substantially more efficient at handling the curved grids which arise within the context of high-order methods. An implementation of this new algorithm is presented and combined with a high-order fluid dynamics code. The algorithm is validated against several benchmark problems, including flow over a spinning golf ball at a Reynolds number of 150,000.
	Overset methods are commonly employed to enable the effective simulation of problems involving complex geometries and moving objects such as rotorcraft. This paper presents a novel overset domain connectivity algorithm based upon the direct cut approach suitable for use with GPU-accelerated solvers on high-order curved grids. In contrast to previous methods it is capable of exploiting the highly data-parallel nature of modern accelerators. Further, the approach is also substantially more efficient at handling the curved grids which arise within the context of high-order methods. An implementation of this new algorithm is presented and combined with a high-order fluid dynamics code. The algorithm is validated against several benchmark problems, including flow over a spinning golf ball at a Reynolds number of 150,000.
	#:</pre>		#:</pre>
	# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]		# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]

Ctsolakis: /* 2018 */

2019-03-11T18:35:46Z

2018

← Older revision		Revision as of 13:35, 11 March 2019
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	#A parallel direct cut algorithm for high-order overset methods with application to a spinning golf ball ,[https://www.sciencedirect.com/science/article/pii/S0021999118303450]		#A parallel direct cut algorithm for high-order overset methods with application to a spinning golf ball ,[https://www.sciencedirect.com/science/article/pii/S0021999118303450]
	#: '''J.Crabill, F.D.Witherden, A.Jameson ''' <pre> Abstract :		#: '''J.Crabill, F.D.Witherden, A.Jameson ''' <pre> Abstract :
	#:<pre>		Overset methods are commonly employed to enable the effective simulation of problems involving complex geometries and moving objects such as rotorcraft. This paper presents a novel overset domain connectivity algorithm based upon the direct cut approach suitable for use with GPU-accelerated solvers on high-order curved grids. In contrast to previous methods it is capable of exploiting the highly data-parallel nature of modern accelerators. Further, the approach is also substantially more efficient at handling the curved grids which arise within the context of high-order methods. An implementation of this new algorithm is presented and combined with a high-order fluid dynamics code. The algorithm is validated against several benchmark problems, including flow over a spinning golf ball at a Reynolds number of 150,000.
			#:</pre>
	# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]		# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]
	#: '''Yaoxin Zhang, Yafei Jia ''' <pre> Abstract : This paper presents an automatic mesh generation algorithm for body-fitted structured meshes in Computational Fluids Dynamics (CFD) analysis using the Advancing Extraction Method (AEM). The method is applicable to two-dimensional domains with complex geometries, which have the hierarchical tree-like topography with extrusion-like structures (i.e., branches or tributaries) and intrusion-like structures (i.e., peninsula or dikes). With the AEM, the hierarchical levels of sub-domains can be identified, and the block boundary of each sub-domain in convex polygon shape in each level can be extracted in an advancing scheme. In this paper, several examples were used to illustrate the effectiveness and applicability of the proposed algorithm for automatic structured mesh generation, and the implementation of the method.		#: '''Yaoxin Zhang, Yafei Jia ''' <pre> Abstract : This paper presents an automatic mesh generation algorithm for body-fitted structured meshes in Computational Fluids Dynamics (CFD) analysis using the Advancing Extraction Method (AEM). The method is applicable to two-dimensional domains with complex geometries, which have the hierarchical tree-like topography with extrusion-like structures (i.e., branches or tributaries) and intrusion-like structures (i.e., peninsula or dikes). With the AEM, the hierarchical levels of sub-domains can be identified, and the block boundary of each sub-domain in convex polygon shape in each level can be extracted in an advancing scheme. In this paper, several examples were used to illustrate the effectiveness and applicability of the proposed algorithm for automatic structured mesh generation, and the implementation of the method.

Ctsolakis: /* 2018 */

2019-03-11T18:35:17Z

2018

← Older revision		Revision as of 13:35, 11 March 2019
Line 4:		Line 4:
	#:'''Darren Engwirda'''<pre> Abstract: The generation of high-quality staggered unstructured grids is considered, leading to the development of a new optimisation-based strategy designed to construct weighted ‘Regular-Power’ tessellations appropriate for co-volume type numerical discretisation techniques. This new framework aims to extend the conventional Delaunay–Voronoi primal-dual structure; seeking to assemble generalised orthogonal tessellations with enhanced geometric quality. The construction of these grids is motivated by the desire to improve the performance and accuracy of numerical methods based on unstructured co-volume type schemes, including various staggered grid techniques for the simulation of fluid dynamics and hyperbolic transport. In this study, a new hybrid optimisation strategy is proposed; seeking to optimise the geometry, topology and weights associated with general, two-dimensional Regular-Power tessellations using a combination of gradient-ascent and energy-based techniques. The performance of this new method is tested experimentally, with a range of complex, multi-resolution primal-dual grids generated for various coastal and regional ocean modelling applications.		#:'''Darren Engwirda'''<pre> Abstract: The generation of high-quality staggered unstructured grids is considered, leading to the development of a new optimisation-based strategy designed to construct weighted ‘Regular-Power’ tessellations appropriate for co-volume type numerical discretisation techniques. This new framework aims to extend the conventional Delaunay–Voronoi primal-dual structure; seeking to assemble generalised orthogonal tessellations with enhanced geometric quality. The construction of these grids is motivated by the desire to improve the performance and accuracy of numerical methods based on unstructured co-volume type schemes, including various staggered grid techniques for the simulation of fluid dynamics and hyperbolic transport. In this study, a new hybrid optimisation strategy is proposed; seeking to optimise the geometry, topology and weights associated with general, two-dimensional Regular-Power tessellations using a combination of gradient-ascent and energy-based techniques. The performance of this new method is tested experimentally, with a range of complex, multi-resolution primal-dual grids generated for various coastal and regional ocean modelling applications.
	#:</pre>		#:</pre>
			#A parallel direct cut algorithm for high-order overset methods with application to a spinning golf ball ,[https://www.sciencedirect.com/science/article/pii/S0021999118303450]
			#: '''J.Crabill, F.D.Witherden, A.Jameson ''' <pre> Abstract :
			#:<pre>
	# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]		# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]
	#: '''Yaoxin Zhang, Yafei Jia ''' <pre> Abstract : This paper presents an automatic mesh generation algorithm for body-fitted structured meshes in Computational Fluids Dynamics (CFD) analysis using the Advancing Extraction Method (AEM). The method is applicable to two-dimensional domains with complex geometries, which have the hierarchical tree-like topography with extrusion-like structures (i.e., branches or tributaries) and intrusion-like structures (i.e., peninsula or dikes). With the AEM, the hierarchical levels of sub-domains can be identified, and the block boundary of each sub-domain in convex polygon shape in each level can be extracted in an advancing scheme. In this paper, several examples were used to illustrate the effectiveness and applicability of the proposed algorithm for automatic structured mesh generation, and the implementation of the method.		#: '''Yaoxin Zhang, Yafei Jia ''' <pre> Abstract : This paper presents an automatic mesh generation algorithm for body-fitted structured meshes in Computational Fluids Dynamics (CFD) analysis using the Advancing Extraction Method (AEM). The method is applicable to two-dimensional domains with complex geometries, which have the hierarchical tree-like topography with extrusion-like structures (i.e., branches or tributaries) and intrusion-like structures (i.e., peninsula or dikes). With the AEM, the hierarchical levels of sub-domains can be identified, and the block boundary of each sub-domain in convex polygon shape in each level can be extracted in an advancing scheme. In this paper, several examples were used to illustrate the effectiveness and applicability of the proposed algorithm for automatic structured mesh generation, and the implementation of the method.

Ctsolakis: /* 2018 */

2019-02-18T14:22:26Z

2018

← Older revision		Revision as of 09:22, 18 February 2019
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	== 2018 ==		== 2018 ==
	# Generalised primal-dual grids for unstructured co-volume schemes, [https://www.sciencedirect.com/science/article/pii/S0021999118304868]		# Generalised primal-dual grids for unstructured co-volume schemes, [https://www.sciencedirect.com/science/article/pii/S0021999118304868]
			#:'''Darren Engwirda'''<pre> Abstract: The generation of high-quality staggered unstructured grids is considered, leading to the development of a new optimisation-based strategy designed to construct weighted ‘Regular-Power’ tessellations appropriate for co-volume type numerical discretisation techniques. This new framework aims to extend the conventional Delaunay–Voronoi primal-dual structure; seeking to assemble generalised orthogonal tessellations with enhanced geometric quality. The construction of these grids is motivated by the desire to improve the performance and accuracy of numerical methods based on unstructured co-volume type schemes, including various staggered grid techniques for the simulation of fluid dynamics and hyperbolic transport. In this study, a new hybrid optimisation strategy is proposed; seeking to optimise the geometry, topology and weights associated with general, two-dimensional Regular-Power tessellations using a combination of gradient-ascent and energy-based techniques. The performance of this new method is tested experimentally, with a range of complex, multi-resolution primal-dual grids generated for various coastal and regional ocean modelling applications.
			#:</pre>
	# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]		# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]
			#: '''Yaoxin Zhang, Yafei Jia ''' <pre> Abstract : This paper presents an automatic mesh generation algorithm for body-fitted structured meshes in Computational Fluids Dynamics (CFD) analysis using the Advancing Extraction Method (AEM). The method is applicable to two-dimensional domains with complex geometries, which have the hierarchical tree-like topography with extrusion-like structures (i.e., branches or tributaries) and intrusion-like structures (i.e., peninsula or dikes). With the AEM, the hierarchical levels of sub-domains can be identified, and the block boundary of each sub-domain in convex polygon shape in each level can be extracted in an advancing scheme. In this paper, several examples were used to illustrate the effectiveness and applicability of the proposed algorithm for automatic structured mesh generation, and the implementation of the method.
			#:</pre>
	# Mesh generation, sizing and convergence for onshore and offshore wind farm Atmospheric Boundary Layer flow simulation with actuator discs [https://www.sciencedirect.com/science/article/pii/S0021999118305540]		# Mesh generation, sizing and convergence for onshore and offshore wind farm Atmospheric Boundary Layer flow simulation with actuator discs [https://www.sciencedirect.com/science/article/pii/S0021999118305540]
			#: ''' Abel Gargallo-Peiró, Matias Avila, Herbert Owen, Luis Prieto-Godino, Arnau Folch ''' <pre> Abstract: A new mesh generation process for wind farm modeling is presented together with a mesh convergence and sizing analysis for wind farm flow simulations. The generated meshes are tailored to simulate Atmospheric Boundary Layer (ABL) flows on complex terrains modeling the wind turbines as actuator discs. The wind farm mesher is fully automatic and, given the topography and the turbine characteristics (location, diameter and hub height), it generates a hybrid mesh conformal with the actuator discs and refined upwind and downstream. Moreover, it presents smooth element size transitions across scales and avoids extending high-resolution areas to all the domain. We take advantage of our automatic and robust mesher to study the mesh convergence of our RANS solver with linear elements, obtaining quadratic mesh convergence for a quantity of interest in all the tested cases. In addition, we quantify the mesh resolution at the terrain surface and at the actuator discs required to achieve a given numerical error in simulations in onshore and offshore frameworks. Finally, we present the generated meshes and the simulation results for an offshore and an onshore wind farm. We analyze in detail one particular wind direction for both cases, and for the onshore wind farm we use our automatic framework to estimate the yearly production of energy and measuring the error against the actual produced one.
			#:</pre>
	# Fast spherical centroidal Voronoi mesh generation: A Lloyd-preconditioned LBFGS method in parallel, [https://www.sciencedirect.com/science/article/pii/S0021999118302596]		# Fast spherical centroidal Voronoi mesh generation: A Lloyd-preconditioned LBFGS method in parallel, [https://www.sciencedirect.com/science/article/pii/S0021999118302596]
			#: ''' Huanhuan Yang, Max Gunzburger, Lili Ju ''' <pre> Abstract : Centroidal Voronoi tessellation (CVT)-based mesh generation is a very effective technique for creating high-quality Voronoi meshes and their dual Delaunay triangulations that often play a crucial role in applications, including ocean and atmospheric simulations using finite volume schemes. In the next generation climate models, the spacing scales change dramatically across the whole sphere and require ultra-high resolution and smooth transitions from coarse to fine grid regions. Thus fast and robust spherical CVT (SCVT) meshing algorithms become highly desirable. In this paper, we first propose a Lloyd-preconditioned limited-memory BFGS method for constructing SCVTs that is also applicable to the construction of CVTs of general domains. This method is then parallelized based on overlapping domain decomposition, enabling excellent scalability on distributed systems. Results of several computational experiments show that the new method could incur computational time costs one order of magnitude smaller compared with some existing methods for generating large-scale highly variable-resolution meshes, while also providing significant improvements in mesh quality.
			#:</pre>
	# Binarized-octree generation for Cartesian adaptive mesh refinement around immersed geometries, [https://www.sciencedirect.com/science/article/pii/S002199911830264X]		# Binarized-octree generation for Cartesian adaptive mesh refinement around immersed geometries, [https://www.sciencedirect.com/science/article/pii/S002199911830264X]
	# Metric-based anisotropic mesh adaptation for 3D acoustic boundary element methods, [https://www.sciencedirect.com/science/article/pii/S0021999118304261]		# Metric-based anisotropic mesh adaptation for 3D acoustic boundary element methods, [https://www.sciencedirect.com/science/article/pii/S0021999118304261]

Ctsolakis: /* 2018 */

2019-02-12T14:35:48Z

2018

← Older revision		Revision as of 09:35, 12 February 2019
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	# Fast spherical centroidal Voronoi mesh generation: A Lloyd-preconditioned LBFGS method in parallel, [https://www.sciencedirect.com/science/article/pii/S0021999118302596]		# Fast spherical centroidal Voronoi mesh generation: A Lloyd-preconditioned LBFGS method in parallel, [https://www.sciencedirect.com/science/article/pii/S0021999118302596]
	# Binarized-octree generation for Cartesian adaptive mesh refinement around immersed geometries, [https://www.sciencedirect.com/science/article/pii/S002199911830264X]		# Binarized-octree generation for Cartesian adaptive mesh refinement around immersed geometries, [https://www.sciencedirect.com/science/article/pii/S002199911830264X]
			# Metric-based anisotropic mesh adaptation for 3D acoustic boundary element methods, [https://www.sciencedirect.com/science/article/pii/S0021999118304261]

	== 2012 ==		== 2012 ==
	# An improved nearly-orthogonal structured mesh generation system with smoothness control functions, [https://www.sciencedirect.com/science/article/pii/S0021999112002471]		# An improved nearly-orthogonal structured mesh generation system with smoothness control functions, [https://www.sciencedirect.com/science/article/pii/S0021999112002471]

Ctsolakis: /* 2018 */

2019-02-12T14:33:37Z

2018

← Older revision		Revision as of 09:33, 12 February 2019
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	# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]		# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]
	# Mesh generation, sizing and convergence for onshore and offshore wind farm Atmospheric Boundary Layer flow simulation with actuator discs [https://www.sciencedirect.com/science/article/pii/S0021999118305540]		# Mesh generation, sizing and convergence for onshore and offshore wind farm Atmospheric Boundary Layer flow simulation with actuator discs [https://www.sciencedirect.com/science/article/pii/S0021999118305540]
			# Fast spherical centroidal Voronoi mesh generation: A Lloyd-preconditioned LBFGS method in parallel, [https://www.sciencedirect.com/science/article/pii/S0021999118302596]
			# Binarized-octree generation for Cartesian adaptive mesh refinement around immersed geometries, [https://www.sciencedirect.com/science/article/pii/S002199911830264X]
			== 2012 ==
			# An improved nearly-orthogonal structured mesh generation system with smoothness control functions, [https://www.sciencedirect.com/science/article/pii/S0021999112002471]

Ctsolakis: /* 2018 */

2019-02-12T14:28:53Z

2018

← Older revision		Revision as of 09:28, 12 February 2019
Line 3:		Line 3:
	# Generalised primal-dual grids for unstructured co-volume schemes, [https://www.sciencedirect.com/science/article/pii/S0021999118304868]		# Generalised primal-dual grids for unstructured co-volume schemes, [https://www.sciencedirect.com/science/article/pii/S0021999118304868]
	# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]		# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]
			# Mesh generation, sizing and convergence for onshore and offshore wind farm Atmospheric Boundary Layer flow simulation with actuator discs [https://www.sciencedirect.com/science/article/pii/S0021999118305540]

Ctsolakis: /* 2018 */

2019-02-12T14:27:03Z

2018

← Older revision		Revision as of 09:27, 12 February 2019
Line 2:		Line 2:
	== 2018 ==		== 2018 ==
	# Generalised primal-dual grids for unstructured co-volume schemes, [https://www.sciencedirect.com/science/article/pii/S0021999118304868]		# Generalised primal-dual grids for unstructured co-volume schemes, [https://www.sciencedirect.com/science/article/pii/S0021999118304868]
	# 2D automatic body-fitted structured mesh generation using advancing extraction method, [ https://www.sciencedirect.com/science/article/pii/S0021999117307714]		# 2D automatic body-fitted structured mesh generation using advancing extraction method, [https://www.sciencedirect.com/science/article/pii/S0021999117307714]

Ctsolakis at 14:26, 12 February 2019

2019-02-12T14:26:53Z

← Older revision		Revision as of 09:26, 12 February 2019
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	= Journal of Computational Physics =		= Journal of Computational Physics =
			== 2018 ==
	# Generalised primal-dual grids for unstructured co-volume schemes, ~~2018~~, [https://www.sciencedirect.com/science/article/pii/~~S0021999118304868~~]		# Generalised primal-dual grids for unstructured co-volume schemes, [https://www.sciencedirect.com/science/article/pii/S0021999118304868]
			# 2D automatic body-fitted structured mesh generation using advancing extraction method, [ https://www.sciencedirect.com/science/article/pii/S0021999117307714]

Ctsolakis: Created page with "= Journal of Computational Physics = # Generalised primal-dual grids for unstructured co-volume schemes, 2018, [https://www.sciencedirect.com/science/article/pii/S00219991183..."

2019-02-12T14:21:59Z

Created page with "= Journal of Computational Physics = # Generalised primal-dual grids for unstructured co-volume schemes, 2018, [https://www.sciencedirect.com/science/article/pii/S00219991183..."

New page

= Journal of Computational Physics =

# Generalised primal-dual grids for unstructured co-volume schemes, 2018, [https://www.sciencedirect.com/science/article/pii/S0021999118304868]