pasive particles

mba_olufemi · June 12, 2020, 05:39

Dear all,

I think I finally understand all the parameters needed for a successful definition of Lagrangian injector and the corresponding kinematicCloudProperties and run my closed geometries simulation. If there is interest I would post my findings.

Now I need an advice on the solver. What solver would you advice for simulating a cloud of passively dragged scarce particles in a flow impinging on an obstacle? My particles don’t evaporate or burn; the tunnel they fly in is isothermal and the flow is much below sonic speeds.

How to define the interaction properties with the obstacle in a way that that some particles would bounce, some stick and some slip?

Is there an example I could study?

Thanks a lot
Mba

oswald · July 28, 2020, 06:05

I would suggest to build your own solver. Your case description seems as pimpleFoam would be a good base. Include the kinematicCloud-functionality there.

The handling of patch collisions is done by patch interaction models. You can find them in "src/lagrangian/intermediate/submodels/Kinematic/PatchInteractionModel/". Having a look at "StandardWallInteraction.C" gives you an example how to define what is done with particles when they hit a patch. Here it is predefined by a switch in a dictionary. Instead, you could for example define a critical normal velocity, below which particles stick, and above which particles bounce.

June 12, 2020, 05:39	pasive particles	#1
mba_olufemi New Member mba olufemi Join Date: Aug 2018 Posts: 6 Rep Power: 7	Dear all, I think I finally understand all the parameters needed for a successful definition of Lagrangian injector and the corresponding kinematicCloudProperties and run my closed geometries simulation. If there is interest I would post my findings. Now I need an advice on the solver. What solver would you advice for simulating a cloud of passively dragged scarce particles in a flow impinging on an obstacle? My particles don’t evaporate or burn; the tunnel they fly in is isothermal and the flow is much below sonic speeds. How to define the interaction properties with the obstacle in a way that that some particles would bounce, some stick and some slip? Is there an example I could study? Thanks a lot Mba

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
how to determine the number of particles injected.	welch	FLUENT	2	January 18, 2024 04:08
dsmcFoam - micro-hole limiting the number of dsmc particles	Araist	OpenFOAM Running, Solving & CFD	0	June 25, 2015 06:50
Add lagrangian particles to OpenFoam solver	luchen2408	OpenFOAM	0	June 2, 2015 03:10
trying to simulate two-phase jet flow with particles in surface injection	ajkratos	FLUENT	5	March 3, 2015 21:33
particles model	ati_ros61	FLOW-3D	3	December 6, 2009 16:03

July 28, 2020, 06:05		#2
oswald Member Join Date: Sep 2010 Location: Leipzig, Germany Posts: 93 Rep Power: 15	I would suggest to build your own solver. Your case description seems as pimpleFoam would be a good base. Include the kinematicCloud-functionality there. The handling of patch collisions is done by patch interaction models. You can find them in "src/lagrangian/intermediate/submodels/Kinematic/PatchInteractionModel/". Having a look at "StandardWallInteraction.C" gives you an example how to define what is done with particles when they hit a patch. Here it is predefined by a switch in a dictionary. Instead, you could for example define a critical normal velocity, below which particles stick, and above which particles bounce.