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-   -   NEGETIVE VOLUME (http://www.cfd-online.com/Forums/fluent/43051-negetive-volume.html)

ammi reddy December 7, 2006 02:06

NEGETIVE VOLUME
 
hi i am doing dyanamic meshing for piston and cylinder arangement of pulse tube REFRIGERATOR .A udf is given to piston for velocity i have done meshing in gambit

now i am facing following problem

Error: Update-Dynamic-Mesh failed. Negative cell volume detected. Error Object: ()

how to solve it

AMMI REDDY

Ryan December 8, 2006 01:37

Re: NEGETIVE VOLUME
 
Hi Ammi,

How are you moving it.

Is it based on the pressure from the fluid or time.

Regards

Rajit

ammi reddy December 8, 2006 04:26

Re: NEGETIVE VOLUME
 
hi

i am doing on time basis velocity of piston is given by

V= A cos(wt)

A and w are const , values r given in UDF the piston has to move forward and backward

PLZ HELP

AMMI REDDY


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