VWT time required

Altair Forum User

How much time on an average is required for VWT to complete the analysis completely. I've been waiting since 4 hours for a simple circular plate simulation.

My computer specs are i5 2.2 gigs

8GB ram

2gb amd radeon m330 graphic card.

 

On an average, give me an estimate of a fine tunnel mesh and a coarse mesh for transient conditions both road and tires moving of an FSAE race car perfectly meshed in hm

I run with 4 cores. The green bar won't move more than say 20%

Altair Forum User

For even a simple meshed square plate, it shows JOB_NOT_STARTED in the command window

The virtual wind tunnel analysis are not starting up

<?xml version="1.0" encoding="UTF-8"?>

ydigit

I would say a coarse mesh should be done in 1-4 hours on such a machine. (lots of assumption though).

 

My guess is that you have issues with mesh generation and the run never started.

 

Check if CAD.DIR and MESHSIM.DIR were created in the run folder (Name_ of_Run _time_stamp).

     This indicates that the meshing process was started. Open the file vwtAnalysis.MeshSim.txt in a text editor. This is meshing log file that indicates how far the meshing process went. In case volume mesh was successfully created, the last few lines of this file would be similar to:

 

Please follow the trouble shooting guidelines on:

http://forum.altairhyperworks.com/index.php?/topic/13776-workflow-for-virtual-wind-tunnel/&do=findComment&comment=20229

Altair Forum User

acuMeshSim: *** ASSERTION in Function <amsReadXml> File <amsReader.cpp> Line <62>

acuMeshSim: *** There should be atleast one volume group
Sim:                         
Date = Thu Dec 24 14:37:28 2015
acuMeshSim:                      
Problem = vwtAnalysis
acuMeshSim:                          
Run = 1
acuMeshSim:                     
Hostname = SMAK
acuMeshSim:                     
Platform = Whistler 6.2 unknown
acuMeshSim:                      
Machine = win64
acuMeshSim:                      
Release = 13.0
acuMeshSim:                 
Release date = Jun  6 2014
acuMeshSim: --------------------------------------------------------------
 

What does it mean by there should be only one volume group. I have a simple rectangular meshed plate. And no free edges, so closed

It is partly submerged in the road......

 

BTW, thank you, ydigit

ydigit

Can you post a screenshot of HyperMesh, with the mesh and the component tree  (in Model Browser)?

 

Does the rectangular plate have a volume? Or is it only in one plane?  It would be best if you could upload the .HM file.