[shydoz]

Hi all,

I am running an unsteady particle deposition analysis on a throat model. I am analysing the deposition of the particles on the wall boundary and I came across this on the tutorial guide for unsteady flows:

“In STAR-CCM+, it is possible to select the specific boundary interaction mode to control the outcome of a particle satisfying the adhere condition. The default in unsteady is Stick”

I was just wondering what the difference between this ‘’stick’’ condition and analysing the particle deposition using boundary sampling with the wall as the boundary.

Shouldn’t these two be showing the same thing because they are both monitoring when the particles contact the boundary?

Thanks in advance

[ashokac7]

Yes they should indicate same quantity. Boundary sampling is however more detailed. If you don't need detailed parcel property use stick option and report the particle scalar.

[shydoz]

Originally Posted by ashokac7

Yes they should indicate same quantity. Boundary sampling is however more detailed. If you don't need detailed parcel property use stick option and report the particle scalar.

Hi Ashok,

Thank you for this .

I need detailed parcel property to see how it is contacting the boundary at different timesteps.

Do you know how to do boundary sampling at different timesteps? Currently my simulation is only showing boundary contact at the last timestep

[ashokac7]

I think for this you have to switch on track file in Lagrangian model selection. I don't know exact procedure now but it can be done. I have to read to know exact procedure. You can find this on the Steve Portal. Just search for Boundary Sampling.