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-   -   DPM transient laminar flow over a cylinder (http://www.cfd-online.com/Forums/fluent/87117-dpm-transient-laminar-flow-over-cylinder.html)

JSoares April 11, 2011 23:40

DPM transient laminar flow over a cylinder
 
Hello everyone

Iīm trying a simple case:

A flow over a cylinder at Re=80, with unsteady formulation.
I turned radiation scheme "do", so that the cylinder send radiation.
Then i inject particles to measure uv radiation that every particle had received.

Iīve doubts and problems:

1- Should i turn on dpm after the flow and radiation convergence or should turn before any simulation.
2- I inject particles from a surface "inlet" and i didnīt change start and stop time. should ?. The problem is that if i check unsteady particle track it happens nothing (literally), but if i uncheck that optinon i can mesure radiation i every particle. i donīt understand waht iīm doing wrong.

Notice that I have and udf implmented that mesure this quantities and works real fine.

In advance thanks.

tirtha April 12, 2011 02:37

hi
once you will use dpm , i guess you have to give ESCAPE condition on the "inlet" and "outlet"
try to give a certain start and stop time and see whether your getting any particles inside your geometry.

im not sure but it may help,

tirtha


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