[Chhotelal1234]

Dear Expert,

I'm facing confusion regarding the incorrect retrieval of the Reynold number value when saving it in a UDF using UDMI. I've developed a UDF for exchanging properties in multiphase modeling, specifically aiming to save the Reynold number value via UDMI. However, the stored value doesn't appear to be accurate.

The Reynold number equation I'm using is Re = (rho_g * abs_v * dp)/mu_L, where the variables rho_g, abs_v, dp, and mu_L obtain values from the cell.

My attempt to store the Reynold number value in UDMI is as follows:


C_UDMI(c, t_mix, 0) = Re;


I've also experimented with alternative storage locations like (C, t_gas, 0) and (C, t_solid, 0), but the results remain inaccurate. Could you please advise on the possible reasons behind this issue and suggest the correct approach?

[AlexanderZ]

check ansys fluent customization manual
2.4.3.3. Example 1 - Custom Drag Law