[Chris G]

Hello everyone,

I'm trying to get an acoustic resonance of air in tube, closed at one side. I'm doing it using deforming mesh (periodic displacement option). I use sweepable mesh (since I've been told I need to use this, because of possible negative volume errors), I set up the model - in order to decrease computational space I use 1/4 of air cylinder, and use symmetry boundary twice - and set up deforming wall at one side of cylinder (so I put the deformation of 1mm in X direction only, proper frequency, phase angle - I need to obtain sinusoidal oscillation). Mesh movement on all other walls of the cylinder is set up as unspecified.

When I start computations, only 0th iteration is performed, and then I get this error message:


Details of error:-
----------------
Error detected by routine PEEKI
CDANAM = MESHDISP/IEQN
CRESLT = NONE

Current Directory : /FLOW/ALGORITHM/ZN1/SYSTEM/EQUATIONS

ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine MEMERR


I tried to find similar case (error) on this forum, but I failed. Does anyone know what is going on? I'd appreciate any help.

[urosgrivc]

I hawe a filing that it has something to do with phase angle or time steping.

[ghorrocks]

I have never used the periodic displacement option you used. I always define my own displacement function and this approach has always worked for me.

The error suggests you have missed setting a required parameter in the mesh displacement set up somewhere, but gives you no clues as to which parameter is missing.