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udf for tank sloshing

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Old   November 21, 2013, 02:30
Post udf for tank sloshing
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i have written udf for sinusoidal wall movement given to a 2-d rectangular tank of dimension (3*3),but after iteration it is not showing any results or movement in water phase. i have tried for different end time and taking time step size as 1e-5 and no. of time steps 1000,10000,100000 but for any case showing no result.
attached udf.
#define A 0.05 /* Amplitude=0.05m/s2*/
#define w 1.5 /*angular velocity*/
real AlnrX;
real t;
AlnrX=A*sin(w*t);/*SINUSOIDAL MOTION*/
double pos[ND_ND];
double rho;
real source;
source=-AlnrX*rho; /*momentum source term*/
return source;

plz help me
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Old   February 23, 2014, 11:31
Smile Fuel Tank Sloshing
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Hi Everybody

I have same problem too.
I want to solve Fuel Tank Sloshing with fluent tutorial, but when I follow tutorial steps, at the end, after run calculation, "fluid doesn't move!" Would you help me?
I think I should write zone motion UDF, isn't it ? Do I need ON dynamic mesh ?
How can move the fluid (kerosene) in tank ??

Thanks in advance
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