UDF For DPM Storing Variable

skumar112 · March 1, 2018, 11:12

I am trying to store the mass of droplets before evaopration as I need it for a calculation within fluent I have tried to compile it as below but it does not seem to be working.

real old_m;

DEFINE_DPM_LAW(old_mass, tp, ci)
{
/* store old mass */
old_m = P_MASS(tp);
}

I would really appreciate the help

pakk · March 1, 2018, 11:30

Quote:

it does not seem to be working

Be more specific.
Does it compile?
Does it give warnings?
Does it crash Fluent?
Does it cause divergence?
Does it give no results?
Does it give unexpected results?

Don't let us guess your problem...

skumar112 · March 1, 2018, 11:31

Sorry about that It is not compiling

pakk · March 1, 2018, 11:35

If I go to the manual entry for DEFINE_DPM_LAW, I see that they use TP_MASS(tp) to get the mass instead of P_MASS(tp). So my first guess would be to do what the manual says...

March 1, 2018, 11:12	UDF For DPM Storing Variable	#1
skumar112 Member sunil kumar Join Date: May 2016 Posts: 80 Rep Power: 10	I am trying to store the mass of droplets before evaopration as I need it for a calculation within fluent I have tried to compile it as below but it does not seem to be working. real old_m; DEFINE_DPM_LAW(old_mass, tp, ci) { /* store old mass */ old_m = P_MASS(tp); } I would really appreciate the help

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March 1, 2018, 11:31		#3
skumar112 Member sunil kumar Join Date: May 2016 Posts: 80 Rep Power: 10	Sorry about that It is not compiling

March 1, 2018, 11:35		#4
pakk Senior Member Join Date: Nov 2013 Posts: 1,965 Rep Power: 27	If I go to the manual entry for DEFINE_DPM_LAW, I see that they use TP_MASS(tp) to get the mass instead of P_MASS(tp). So my first guess would be to do what the manual says...