CFD Online Discussion Forums

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   Siemens (https://www.cfd-online.com/Forums/siemens/)
-   -   negative volume (https://www.cfd-online.com/Forums/siemens/52473-negative-volume.html)

Sabatini October 26, 2000 06:31

negative volume
 
Dear people

I have meshed one quarter of rectangular duct canal with vertices than in form of block, but in the cell check I become the error negative geometry. How I can rectify this error thanks


anon October 26, 2000 06:59

Re: negative volume
 
If you use the fix left handed button on the check tool this should fix your negative volumes.

david aquilina October 26, 2000 10:17

Re: negative volume
 
yes,

first do a check for negative volume:

cset,all

check,cset,,right

then the negative cells with but put in a p-register (it should be register 4, range -1 to 0), to get those cells into your current cset use command:

cset,news,prang,4,-1,0

then you want to flip the cells to right handed:

cflip,cset,,,right

that should do it.

later, dave

steve October 26, 2000 10:46

Re: negative volume
 
Dave, Its even easier - You can do check,cset,,right,newset which directly puts the failed cells into the cset in one step. It also might be better to do check,cset,,negvol,newset because, after all, you are looking for the cells with negative volume. Steve

Sabatini October 26, 2000 11:07

Thanks
 
Tahnks dave and Stevef.

i have found the error.

beste thanks

sabatini


All times are GMT -4. The time now is 06:24.