[Roule]

hi all

i want to inject a single particle (mass = 0.001 kg) in a flow, and track the particle using steady DPM.

but in the 'Set Injection Properties' dialog box, it asks for the flow rate (kg/sec)..so how do i decide this flow rate...

should it be
(1) just the mass of the 1 particle, like 0.001 kg/s
or
(2) particle area * density * flow velocity at the injection point

if option (1) then the problem is
that i want to inject only 1 particle, so using 0.001 kg/s will mean something else..isn't it?

and if option (2) then
how do I know the velocity at the injection point?
do i have to run the simulation without DPM first, get the flow velocity at injection point, and then use it to calculate the mass flow rate.

i am just a bit confused about this flow rate thing..

if anyone has any idea, please share...

thanks a lot..