Disperse flow - adding Particles

Particles · November 24, 2020, 11:04

Dear all,

I was wondering how exactly the injection of particles in a fluid works. So if you have a flow from inlet to outlet, and you add Particles at the inlet to track them. How does the solver (MPPICFoam) treat the circumstances of the added mass in the fluid? Is the fluid which was at the area of the particle deleted? How many partcles (amount and mass) can be added (compared to the fluid) without any troubles?
Are there some usual problems with it?

Best!

oswald · November 26, 2020, 05:18

Hi,

I think that the MPPIC solver does account for particle volume fraction in the NS-equations by using the carrier fluid phase fraction as a factor. So yes, the fluid is somehow deleted. The maximum amount of particles is determined by the packing model you use. The dev-version for example provides explicit and implicit packing models.

I suggest reading the original paper by O'Rourke:
https://doi.org/10.1016/0301-9322(95)00072-0

November 24, 2020, 11:04	Disperse flow - adding Particles	#1
Particles New Member Particles Join Date: Nov 2020 Posts: 1 Rep Power: 0	Dear all, I was wondering how exactly the injection of particles in a fluid works. So if you have a flow from inlet to outlet, and you add Particles at the inlet to track them. How does the solver (MPPICFoam) treat the circumstances of the added mass in the fluid? Is the fluid which was at the area of the particle deleted? How many partcles (amount and mass) can be added (compared to the fluid) without any troubles? Are there some usual problems with it? Best!

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November 26, 2020, 05:18		#2
oswald Member Join Date: Sep 2010 Location: Leipzig, Germany Posts: 96 Rep Power: 16	Hi, I think that the MPPIC solver does account for particle volume fraction in the NS-equations by using the carrier fluid phase fraction as a factor. So yes, the fluid is somehow deleted. The maximum amount of particles is determined by the packing model you use. The dev-version for example provides explicit and implicit packing models. I suggest reading the original paper by O'Rourke: https://doi.org/10.1016/0301-9322(95)00072-0