Fluent write UDF for calculating My, Mz and Fz

davesmith_01 · November 17, 2011, 14:18

Hello, I need to calculate two moments and force along the z axis at the end of every timestep. As fluent can only calculate 2 forces and 1 moment in the monitors menu, UDF needs to be written.

The problem is that I do not know how to start this. I know that I should be using Define_execute_at_end so that at the end of the iteration or time-step the moments and forces can be calculated but I do not know what the UDF has to have written. The general Fz and My, Mz equations will be needed but I would need the force to calculate Cz (coeffiicient along z axis).

Any advice is welcome.

rajesh1987 · November 20, 2011, 21:20

I want to do modeling of a fluidized bed using eulerian model...and also involved the both types of reactions, homogenous and heterogeneous. But i don't know how to write reactions with coefficients in fluent 6.3 ???

November 17, 2011, 14:18	Fluent write UDF for calculating My, Mz and Fz	#1
davesmith_01 New Member Dave Smith Join Date: Jul 2010 Posts: 27 Rep Power: 15	Hello, I need to calculate two moments and force along the z axis at the end of every timestep. As fluent can only calculate 2 forces and 1 moment in the monitors menu, UDF needs to be written. The problem is that I do not know how to start this. I know that I should be using Define_execute_at_end so that at the end of the iteration or time-step the moments and forces can be calculated but I do not know what the UDF has to have written. The general Fz and My, Mz equations will be needed but I would need the force to calculate Cz (coeffiicient along z axis). Any advice is welcome.

November 20, 2011, 21:20	Fluidized bed modeling	#2
rajesh1987 New Member Rajesh Choudhary Join Date: Nov 2011 Location: Alwar, Rajasthan, India Posts: 7 Rep Power: 14	I want to do modeling of a fluidized bed using eulerian model...and also involved the both types of reactions, homogenous and heterogeneous. But i don't know how to write reactions with coefficients in fluent 6.3 ???