In steady state, the number of dpm particles in a stream can be measured using ‘strength’, ie: /* mp_dot is the mass source to the continuous phase * (Difference in mass between entry and exit from cell) * multiplied by strength (Number of particles/s in stream) */ mp_dot = (TP_MASS0(tp) – TP_MASS(tp)) * strength; What is the usage for transient DPM?
January 25, 2023 at 7:17 amFAQParticipant
The parameter “strength” is passed into DEFINE_DPM_SOURCE UDFs. In transient it is the number of particles in a parcel, divided by the solver flow time step. It is used to scale the source term of a single “reference” particle to provide the right source term for all the particles of this parcel. The is designed parameter in such a way that you can use the same UDF for transient and steady simulations without the need to distinguish.
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