2.5.11 DEFINE_DPM_SOURCE

Description

You can use DEFINE_DPM_SOURCE to specify particle source terms. The function allows access to the accumulated source terms for a particle in a given cell before they are added to the mass, momentum, and energy exchange terms for coupled DPM calculations.

Usage

DEFINE_DPM_SOURCE( name, c, t, S, strength, p)

Argument Type	Description
symbol name	UDF name.
cell_t c	Index that identifies the cell that the particle is currently in.
Thread *t	Pointer to the thread the particle is currently in.
dpms_t *S	Pointer to the source structure dpms_t, which contains the
	source terms for the cell.
real strength	Particle number flow rate in particles/second (divided by the
	number of tries if stochastic tracking is used).
Tracked_Particle *p	Pointer to the Tracked_Particle data structure which
	contains data related to the particle being tracked.
Function returns
void

There are six arguments to DEFINE_DPM_SOURCE: name, c, t, S, strength, and p. You supply name, the name of the UDF. c, t, S, strength, and p are variables that are passed by the ANSYS FLUENT solver to your UDF. The modified source terms, after they have been computed by the function, will be stored in S.

Pointer p can be used as an argument to the macros defined in Section  3.2.7 to obtain information about particle properties (e.g., injection properties).

Example

See Section  2.5.13 for an example of DEFINE_DPM_SOURCE usage.

Hooking a DPM Source Term UDF to ANSYS FLUENT

After the UDF that you have defined using DEFINE_DPM_SOURCE is interpreted (Chapter  4) or compiled (Chapter  5), the name of the argument that you supplied as the first DEFINE macro argument will become visible in the Discrete Phase Model dialog box in ANSYS FLUENT. See Section  6.4.11 for details on how to hook your DEFINE_DPM_SOURCE UDF to ANSYS FLUENT.