CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Meshing & Mesh Conversion

[snappyHexMesh] Coarse mesh

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 1, 2023, 10:55
Default Coarse mesh
  #1
New Member
 
Join Date: May 2023
Posts: 4
Rep Power: 2
JulioAmodia is on a distinguished road
Hi there,

This is Julio. I am new to OpenFoam and CFD. I have a very basic question but I am having a hard time trying to fix it.
I have a very basic space I want to analyze the temperature and air speed variations within. I have inlet boundaries and some other interior features. The problem occurs when generating the main boundary of the space the shape is similar to a semicircle but I simplified it with straight lines. However, when I run the OpenFOAM meshing it generates a mesh with very coarse edges and this gives me very strange results.
I have marked in red how I think it should be to obtain more realistic results.
Does anybody know why is this happening? which parameters should I modify to obtain a straight mesh? which is the right settings so all the inlets work as they should? which is the right boundary type for a AC system, inlet boundary or inlet flow-rate boundary?

Thanks in advance.
Attached Images
File Type: jpg Open Foam HVAC inlets Atrium.jpg (57.8 KB, 12 views)
File Type: jpg Refined edges.jpg (72.6 KB, 13 views)
JulioAmodia is offline   Reply With Quote

Old   June 19, 2023, 09:10
Default
  #2
Member
 
Vinzenz Götz
Join Date: Mar 2021
Location: Munich, Germany
Posts: 31
Rep Power: 5
Vinzmann is on a distinguished road
Hello Julio,

please upload a picture of your mesh and post your sHMDict.

Why do you use straight lines and not just a semicircle?

Where are your inlets and where are your outlets?

What solver are you using?

What boundary conditions are you using right now?

Best regards,
Vinz
Vinzmann is offline   Reply With Quote

Reply

Tags
hvac, snappy hex mesh

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
[snappyHexMesh] Creating multiple multiple cell zones with snappyHexMesh - a newbie in deep water! divergence OpenFOAM Meshing & Mesh Conversion 0 January 23, 2019 04:17
Star CCM Overset Mesh Error (Rotating Turbine) thezack Siemens 7 October 12, 2016 11:14
[snappyHexMesh] snappyHexMesh won't work - zeros everywhere! sc298 OpenFOAM Meshing & Mesh Conversion 2 March 27, 2011 21:11
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 11:55
Icemcfd 11: Loss of mesh from surface mesh option? Joe CFX 2 March 26, 2007 18:10


All times are GMT -4. The time now is 17:39.