Difference between revisions of "Isotropic Mesh Generation"

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(→‎more nacelle, rocket, and lv2b pg. 125-127)
(→‎nacelle, rocket, and lv2b pg. 122-124)
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== nacelle, rocket, and lv2b pg. 122-124 ==
 
== nacelle, rocket, and lv2b pg. 122-124 ==
 
<div><ul>  
 
<div><ul>  
−
<li style="display: inline-block;"> [[File: nacelle6.png|thumb|none|450px|''PLACEHOLDER'']] </li>
+
<li style="display: inline-block;"> [[File: nacelle6.png|thumb|none|450px]] </li>
−
<li style="display: inline-block;"> [[File: nacelle7.png|thumb|none|450px|''PLACEHOLDER'']] </li>
+
<li style="display: inline-block;"> [[File: nacelle7.png|thumb|none|450px]] </li>
−
<li style="display: inline-block;"> [[File: nacelle8.png|thumb|none|450px|''PLACEHOLDER'']] </li>
+
<li style="display: inline-block;"> [[File: nacelle8.png|thumb|none|450px]] </li>
 
</ul></div>
 
</ul></div>
 +
 +
:Surface grid of an aircraft nacelle with engine inside a section of wind tunnel.
 +
:<nowiki>#</nowiki>points: 27184; #triangles: 54360
 +
<br><br><br>
  
 
<div><ul>  
 
<div><ul>  
−
<li style="display: inline-block;"> [[File: rocket8.png|thumb|none|450px|''PLACEHOLDER'']] </li>
+
<li style="display: inline-block;"> [[File: rocket8.png|thumb|none|450px]] </li>
−
<li style="display: inline-block;"> [[File: rocket6.png|thumb|none|450px|''PLACEHOLDER'']] </li>
+
<li style="display: inline-block;"> [[File: rocket6.png|thumb|none|450px]] </li>
 
</ul></div>
 
</ul></div>
 +
 +
:Surface grid of a rocket with engine, nozzle and transparent internal data surfaces inside flow field.
 +
:<nowiki>#</nowiki>points: 20228; #triangles: 40448
 +
<br><br><br>
  
 
<div><ul>  
 
<div><ul>  
−
<li style="display: inline-block;"> [[File: lv2b2.png|thumb|none|450px|''PLACEHOLDER'']] </li>
+
<li style="display: inline-block;"> [[File: lv2b2.png|thumb|none|450px]] </li>
−
<li style="display: inline-block;"> [[File: lv2b6.png|thumb|none|450px|''PLACEHOLDER'']] </li>
+
<li style="display: inline-block;"> [[File: lv2b6.png|thumb|none|450px]] </li>
 
</ul></div>
 
</ul></div>
 +
 +
:Surface grid of a launch vehicle with solid boosters inside flow field (Lv2b).
 +
:<nowiki>#</nowiki>points: 42020; #triangles: 84024
 +
<br><br><br>
 +
 +
{| class="wikitable"
 +
|+ Parameters for unstructured grid generation. Additional parameters only for CDT3D: nthreads : 12 (parallel); nthreads : 1 (sequential); nbuckets : 240; frbtransf : 0.3; cbtransf : 1.0. Additional parameters only for AFLR: mrecrbf : 0.
 +
|-
 +
! scope="col" | Geometry !! colspan=2 | Software !! colspan=2 | cdfm !! colspan=2 | cdfn !! colspan=2 | mrecm !! colspan=2 | nqual !! colspan=2 | csmth !! colspan=2 | msmth !! colspan=2 | nsmth !! colspan=2 | angdfs !! colspan=2 | angqual !! colspan=2 | mdbs
 +
|-
 +
!  Nacelle  !! colspan=2 | CDT3D !! colspan=2 | 0.291 !! colspan=2 | 0.7 !! colspan=2 | 2 !! colspan=2 | 3 !! colspan=2 | 0.5 !! colspan=2 | 1 !! colspan=2 | 2 !! colspan=2 | 165° !! colspan=2 | 120° !! colspan=2 | 0
 +
|-
 +
!    !! colspan=2 | AFLR !! colspan=2 | 0.50 !! colspan=2 | 0.7 !! colspan=2 | 2 !! colspan=2 | 3 !! colspan=2 | 0.5 !! colspan=2 | 1 !! colspan=2 | 2 !! colspan=2 | 165° !! colspan=2 | 120° !! colspan=2 | 0
 +
|-
 +
!  Rocket  !! colspan=2 | CDT3D !! colspan=2 | 0.20 !! colspan=2 | 0.7 !! colspan=2 | 2 !! colspan=2 | 3 !! colspan=2 | 0.5 !! colspan=2 | 1 !! colspan=2 | 2 !! colspan=2 | 165° !! colspan=2 | 120° !! colspan=2 | 0
 +
|-
 +
!    !! colspan=2 | AFLR !! colspan=2 | 0.60 !! colspan=2 | 0.7 !! colspan=2 | 2 !! colspan=2 | 3 !! colspan=2 | 0.5 !! colspan=2 | 1 !! colspan=2 | 2 !! colspan=2 | 165° !! colspan=2 | 120° !! colspan=2 | 0
 +
|-
 +
!  Lv2b  !! colspan=2 | CDT3D !! colspan=2 | 0.234 !! colspan=2 | 0.7 !! colspan=2 | 2 !! colspan=2 | 3 !! colspan=2 | 0.5 !! colspan=2 | 1 !! colspan=2 | 2 !! colspan=2 | 165° !! colspan=2 | 120° !! colspan=2 | 0
 +
|-
 +
!    !! colspan=2 | AFLR !! colspan=2 | 0.30 !! colspan=2 | 0.7 !! colspan=2 | 2 !! colspan=2 | 3 !! colspan=2 | 0.5 !! colspan=2 | 1 !! colspan=2 | 2 !! colspan=2 | 165° !! colspan=2 | 120° !! colspan=2 | 0
 +
|}
  
 
== more nacelle, rocket, and lv2b pg. 125-127 ==
 
== more nacelle, rocket, and lv2b pg. 125-127 ==

Revision as of 12:03, 27 March 2018

Sphere and Two Blades with Merging Wakes and a Symmetry Plane

  • (a) Input Surface
  • (b) cdfm: 0; #tets: 57K
  • (c) cdfm: 0.2; #tets: 58K
  • (d) cdfm: 0.6; #tets: 129K
  • (e) cdfm: 0.8; #tets: 854K
  • (f) cdfm: 0.9; #tets: 7.68M

Cuts of tetrahedral grids of a sphere generated for varied cdfm ∈ [0, 1]. Blue corresponds to larger values of the distribution function. Red corresponds to smaller values
of the distribution function.





  • (a) Input Surface
  • (b) Distribution function on the boundary
  • (c) cdfm: 0; #tets: 806K
  • (d) cdfm: 0.1; #tets: 1.41M
  • (e) cdfm: 0.2; #tets: 4.97M
  • (f) cdfm: 0.3; #tets: 16.54M

Cuts of tetrahedral grids of two blades with merging wakes and a symmetry plane enclosed in an outer boundary generated for varied cdfm ∈ [0, 1] (shown in (c)-(f)).
The input surface is depicted in (a)-(b). The wake region is modeled as an embedded/ transparent delete surface.





  • Sphere histogram.png

Element angle distribution (in 5-deg increments) of grids of sphere, for varied cdfm.
The dihedral angle extrema and the element count are reported for each grid.



  • Blades histogram.png

Element angle distribution (in 5-deg increments) of grids of two blades with
merging wakes and a symmetry plane enclosed in an outer boundary, for varied cdfm.
The dihedral angle extrema and the element count are reported for each grid.

nacelle, rocket, and lv2b pg. 122-124

  • Nacelle6.png
  • Nacelle7.png
  • Nacelle8.png
Surface grid of an aircraft nacelle with engine inside a section of wind tunnel.
#points: 27184; #triangles: 54360




  • Rocket8.png
  • Rocket6.png
Surface grid of a rocket with engine, nozzle and transparent internal data surfaces inside flow field.
#points: 20228; #triangles: 40448




  • Lv2b2.png
  • Lv2b6.png
Surface grid of a launch vehicle with solid boosters inside flow field (Lv2b).
#points: 42020; #triangles: 84024




Parameters for unstructured grid generation. Additional parameters only for CDT3D: nthreads : 12 (parallel); nthreads : 1 (sequential); nbuckets : 240; frbtransf : 0.3; cbtransf : 1.0. Additional parameters only for AFLR: mrecrbf : 0.
Geometry Software cdfm cdfn mrecm nqual csmth msmth nsmth angdfs angqual mdbs
Nacelle CDT3D 0.291 0.7 2 3 0.5 1 2 165° 120° 0
AFLR 0.50 0.7 2 3 0.5 1 2 165° 120° 0
Rocket CDT3D 0.20 0.7 2 3 0.5 1 2 165° 120° 0
AFLR 0.60 0.7 2 3 0.5 1 2 165° 120° 0
Lv2b CDT3D 0.234 0.7 2 3 0.5 1 2 165° 120° 0
AFLR 0.30 0.7 2 3 0.5 1 2 165° 120° 0

more nacelle, rocket, and lv2b pg. 125-127

  • PLACEHOLDER
  • PLACEHOLDER
  • PLACEHOLDER
  • PLACEHOLDER
  • PLACEHOLDER
  • PLACEHOLDER
  • PLACEHOLDER
  • PLACEHOLDER
  • PLACEHOLDER
  • PLACEHOLDER
  • PLACEHOLDER
  • PLACEHOLDER


  • PLACEHOLDER
  • PLACEHOLDER


  • PLACEHOLDER
  • PLACEHOLDER


  • PLACEHOLDER
  • PLACEHOLDER

aircraft pg. 140-142

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