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subramani May 5, 2008 07:55

Non-zero side area
 
While running a transient analysis with moving mesh, I am getting the following kind of error. Will it affect the solution. How to avoid the kind of error?

WARNING #113 *** CELL 10238 BEING REMOVED HAS NON-ZERO SIDE AREAS - CHECK IN PROSTAR FOR POSSIBLE MESH MOVEMENT ERROR

*** WARNING #113 *** CELL 10238 BEING REMOVED HAS NON-ZERO SIDE AREAS - CHECK IN PROSTAR FOR POSSIBLE MESH MOVEMENT ERROR

Thanks in advance

Anton Lyaskin May 6, 2008 08:13

Re: Non-zero side area
 
This means that the cells you're removing are not fully collapsed. Try to make a preview run with mesh motion only (i.e. no flow field simulation). For this set RCONST 4 to 1.0

subramani May 12, 2008 03:02

Re: Non-zero side area
 
Hi Anton,

Thanks for your reply.Can u explain me how to preview the run with mesh motion & To set the RCONST value, whether I need to type the same in Pro/star output window?

subramani May 13, 2008 00:43

Re: Non-zero side area
 
Hi anton,

As you said i did preview run with mesh motion by setting RCONST 4 to 1.0. After completion of run, if I check in the info file, following warning message displayed

*** WARNING #113 *** CELL 17 BEING REMOVED HAS NON-ZERO SIDE AREAS - CHECK IN PROSTAR FOR POSSIBLE MESH MOVEMENT ERROR"

I run the cold flow simulation(Only compression stroke simulation) using time step as 0.25 deg.simulation completed & I was able to see the results like velocity,pressure distribution.Pressure values obtained fro the simulation are not matching to the calculated value.

But still there is a warning message mentioned above in the info file.


Anton Lyaskin May 15, 2008 06:32

Re: Non-zero side area
 
The idea of mesh preview run is to check visually your mesh at every time step. So before running the mesh preview you need to turn on writing the results to transient post file (pstt) at every time step. After this you will be able to see the actual condition of your mesh at the desired moment of time (don't forget to turn on Moving Mesh option when loading pstt file). Look at cell 17 to check weather it's fully collapsed at moment of its removal.


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