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Create volume in CFX post for analysis purposes |
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#1 |
New Member
Nicolas
Join Date: Mar 2010
Posts: 13
Rep Power: 16 ![]() |
Dear forum members,
I'm looking for a possibility to create a geometrically defined volume that I can later perform calculations on. Or to put it in other words, I want to create a rectangular cuboid within my fluid domain that I can refer to for additional calculations, e.g. calculate volume averaged properties. So in my fluid domain, I can create a volume via locations and limit this volume in one dimension (e.g. z-dimension). However, I can't add any more limitations regarding the x- and y-dimension. Any ideas how this can be done? I probably could create a group of iso clips from respective planes and average the results outside CFX, but this is not straight forward and not a “real” volume averaging, so I hope there is a better option. |
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#2 |
Senior Member
Lance
Join Date: Mar 2009
Posts: 669
Rep Power: 22 ![]() |
One idea:
Make an expression defining your boundaries e.g. if(x>1[m],1,0)+if(x<2[m],1,0)+ .... Make a variable of your expression. Make an iso volume of your variable and plot it at value = 6 |
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#3 |
New Member
Nicolas
Join Date: Mar 2010
Posts: 13
Rep Power: 16 ![]() |
Thank you very much for this idea, worked like a charm ;-)
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#4 |
New Member
vikas yadav
Join Date: Jul 2015
Posts: 9
Rep Power: 11 ![]() |
Dear lavoz,
i am also stuck in the same problem. could you please tell me how u have made the expression? |
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#5 |
New Member
Amiya
Join Date: Aug 2017
Posts: 11
Rep Power: 9 ![]() |
Can you please describe in detail.i am performing free surface flow with water being seperated into two halfs by an obstruction I wish to find out the volume passing through right side of the obstruction only.how can I do that?
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#6 |
New Member
jiangsu
Join Date: Dec 2020
Posts: 1
Rep Power: 0 ![]() |
according to the responder above>>
eg. if(x>-165[m],1,0)+if(x<-45[m],1,0)+if(y>31[m],1,0)+if(y<122[m],1,0)+if(z>0[m],1,0)+if(z<8[m],1,0) this expression means mesh coordinates(x,y,z) input will be exported as 0 or 1, so that the algorithm will distinguish and chose the mash cell range(final output will be 6). then, you will get the mesh iso-trim volume. my first answer. |
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#7 |
New Member
Join Date: Jun 2016
Posts: 7
Rep Power: 10 ![]() |
The step is fine for simple volumetric shapes. What if the volume is more complex. Is it for example possible to import a bunch of stl surfaces that define a volume?
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Tags |
post processing, volume, volume averaging, volume generation |
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