CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > Siemens

Strange cells in Trimmed mesh

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 28, 2017, 18:40
Post Strange cells in Trimmed mesh
  #1
New Member
 
Yatish Chandra
Join Date: Feb 2017
Posts: 1
Rep Power: 0
yatsh94 is on a distinguished road
Hey everyone,

I'm relatively new to CFD so my question might sound a bit silly. But this forum is meant for such questions and I would be grateful if anyone could provide some insight into my issue.

I'm trying to study the propwash effects of a propeller on the aerodynamic performance of the horizontal stabilizer of a powered glider. For some initial studies, I am simulating just the propeller with the pylon and nacelle and the tailplane of the aircraft. I also have a rotating region in order to simulate the propeller rotation.

For the meshing, I'm using the parts based automated mesh operation with the surface remesher, timmed cell mesher and prism layer models activated. However I'm noticing quite a lot of strangely shaped cells in the area where the prism layer is located. You can see what I am talking about in the attached pictures.



Meshing parameters:
Base size: 0.003m
surface growth rate: 1.1
20 prism layers
Prism layer near wall thickness: 0.000020494809902570113 (calculated for a desired y+ value of 1.0)
Prism layer total thickness: 0.005m

Prism layer properties: Attached in images

I'm further using custom surface controls to refine the mesh in the horizontal stabilizer and the pylon, nacelle areas.

Minimum face validity is above 0.8 and the minimum volume change is above 1e-03. However, the skewness angles are too large

Could anyone please help me out in identifying the cause of this issue?

Thanks in advance.
Attached Images
File Type: png CFD_1.PNG (9.5 KB, 13 views)
File Type: png CFD2.PNG (20.0 KB, 18 views)
File Type: png CFD3.PNG (21.4 KB, 20 views)
File Type: png CFD4.PNG (43.1 KB, 18 views)
File Type: png CFD5.PNG (31.4 KB, 13 views)
yatsh94 is offline   Reply With Quote

Reply

Tags
meshing, prism layers, starccm+

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
y+ = 1 boundary layer mesh with snappyHexMesh Arzed23 OpenFOAM Running, Solving & CFD 6 November 23, 2022 16:15
[ICEM] Error in mesh writing helios ANSYS Meshing & Geometry 21 August 19, 2021 15:18
[snappyHexMesh] sHM layer process keeps getting killed MBttR OpenFOAM Meshing & Mesh Conversion 4 August 15, 2016 04:21
[snappyHexMesh] SHM problem : KVLCC2 with appendage mesh sc.park OpenFOAM Meshing & Mesh Conversion 1 March 13, 2016 14:28
[snappyHexMesh] snappyHexMesh won't work - zeros everywhere! sc298 OpenFOAM Meshing & Mesh Conversion 2 March 27, 2011 22:11


All times are GMT -4. The time now is 14:55.