Hi Rajib, can you please provide more details on what you are trying to code and the issues you have with your UDFs.

hello Mohsen Sir, i also want help regarding writing udfs..

sir my problem is basically regarding liquid sloshing.i want to simulate sloshing phenomenon in a rectangular tank having two types of motion.

1-sinusoidal velocity input {F=A Sin(wt)} for different amplitudes and different time steps.

2-tank having sudden collision or impact force or when earthquake comes.

sir plz help me ..

i will be thankful to u.

Hello Mohsen, I m trying to carry out a numerical study on the gas-solid flow in the riser of pressurized circulating fluidized bed unit. The experimental study is already done by my supervisor. I ve made the geometry and also applied the other boundary conditions. So now i need to write the UDFs. So sir please , if u can help me in writing those and guide me how to implement those UDFs i will be very thankful to you.