I have done the particle depsoition simulation for my case. My study includes two forces, drag and gravity. Now I want find to out of total (50,000) how many particles are deposited because of drag force and how many beacause of gravity? Is there any way I can do that?
I am using comsol multiphysics 5.4.
Hi,
Firstly, I am not sure what is the situation you are simulating, but still I think if in your system two forces are acting simultaneously on particles and causing them to deposit then each particle deposit as a result of these combined force, so it is not meaningful to say "how many" particles are deposited because what force. You should talk about contribution of each force. Perhaps you can do two separate simulation with only one of the forces activated and compare deposition rate between these two simulations.
Secondly, if you do not know how to count deposited particles then here is one way to do it (again I am not aware of your physics, geometry, etc): in Data Sets (under Results) right click on your Particle data set and add Selection. Select the boundary where particles are deposited and you want to count them. Then in Derived Values add a Global Evaluation, change its data set to your Particle data set and add fpt.Nsel (which is the total number of particles in selection). Now when you press Evaluate it will give you the number of particles on the boundary you've selected. I've attached a screenshot of my own simulation for the following paper:
Article Red blood cell and white blood cell separation using a later...
(in which I had drag and gravity forces acting on particles, though in my case drag was only dragging particles along with fluid).Note that in my case I had two sizes of particles so I added two particle data sets myself (Dp1 & Dp2).
Dear Hamidreza Shirinkami I do not know any thing about Comsol Multiphysics , yet I know little of Gravity, which it is unprecedented way to know gravity. As you know gravity is pulling mass to itself. i.e. the reason we can walk on earth, it because of gravity, but if earth had gravity and pull mass to itself, then why do we have rain? or when a balloon with massive mass of hydrogen or Helium goes up?
There is no right answer for it.
The Gravity is a Quantum Mechanics phenomenon by atoms. Gravity is interna not external
Article Gravity is an Internal Force
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