UDF for solid density
Hello everyone !
I have a conjugated heat transfer problem where water is cooling a multi-constituant wall. I want to avoid setting different zones in my msh so I implemented a UDF to change the properties of the solid depending on the location. So the UDF is really simple : DEFINE_PROPERTY(density,c,t) { real ro; C_CENTROID(x,c,t); if (x[0]>0.17) ro=1650; else ro=7800; C_UDMI(c,t,dens)=ro; return ro; The UDF compiles well and runs but when I plot contours of density all, it does not show the correct values I had put in the UDF. However the UDM values are correct ! Wich values are used in the calculations : the values showed in the contour for density all or the values showed in the contour for the UDM ?? Thank you for your help !! GG |
I did something similar, defining the thermal conductivity of a fluid.
I would remove the line "C_UDMI(c,t,dens)=ro;" Then in fluent, in the material tab, select user defined as the specification method for density and choose you UDF "density". |
Thats what I did.
The UDM was just a test to try and figure out the problem ... If I plot contours of density I dont get the correct values. But contours of UDM is ok ! |
I have similar problem. I would appreciate a quick response.
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