Evaporation in an Incompressible Lagrangian (LPT) solver?

jheide · March 29, 2016, 18:31

Dear all,

I am trying to simulate an evaporating water spray in ambient air, i.e. no chemical reactions, in OpenFOAM 2.4. The only thread which is partly related could be http://www.cfd-online.com/Forums/ope...ble-flows.html . The code presented in that thread was written for OF 2.1 and it does not include evaporation.

Ideally I would like the model to include:

Evaporation (phase change) from the Lagrangian phase (a water droplet) to the continuous phase (air/water mixture)
Dispersion due to eulerian phase turbulence
Two way coupling between the lagrangian/eulerian phase

The sprayFoam solver would suit this problem unless it wasn't a compressible solver. Using a density based solver for my relatively low velocities (droplets U0 ~ 100 m/s) and standard room temperature gives a poor description of the flow (temperature drops etc).

So I guess I will need to create my own solver in case there is none available (?). How should I proceed? As I see it there are two options:

Convert the sprayFoam solver to be incompressible
Add models to icoUncoupledKinematicParcelFoam

Or maybe there is another solution which is easier? If someone could explain which way would be the easiest with a short motivation it would be highly appreciated.

Thanks a lot!

jairoandres · September 19, 2016, 12:19

Hi, I am just having the same inconvenient. I would like to ask you if you were able of converting sprayFoam to an incompressible case? I did CFD simulations using sprayFoam in a spray dryer a couple of years ago but I am very interested in knowing if you obtain sightly different results using a "incompressible" version.

Scram_1 · June 25, 2018, 13:18

Hey,
Has anyone managed to solve this problem? I want to inject water droplets in my computational domain. What I have done is coupled pimpleFoam solver with icoUncoupledKinematicLagrangianFoam which means that my solver now can do transient particle tracking. I have also added the energy equation in the modified solver. Now, I want to study the evaporation of water droplets by considering an 'incompressible' evaporation model. Can someone help me out with this?

Best,
Scram_1

Mh.Sui · March 26, 2019, 09:20

Hi,

I also have this problem, did someone have done?

IC01 · December 16, 2020, 00:39

Hi guys. Is it 2020, anyone solved this inconvenience?

Thank you

March 29, 2016, 18:31	Evaporation in an Incompressible Lagrangian (LPT) solver?	#1
jheide New Member Jakob Heide Join Date: Apr 2014 Posts: 2 Rep Power: 0	Dear all, I am trying to simulate an evaporating water spray in ambient air, i.e. no chemical reactions, in OpenFOAM 2.4. The only thread which is partly related could be http://www.cfd-online.com/Forums/ope...ble-flows.html . The code presented in that thread was written for OF 2.1 and it does not include evaporation. Ideally I would like the model to include: Evaporation (phase change) from the Lagrangian phase (a water droplet) to the continuous phase (air/water mixture) Dispersion due to eulerian phase turbulence Two way coupling between the lagrangian/eulerian phase The sprayFoam solver would suit this problem unless it wasn't a compressible solver. Using a density based solver for my relatively low velocities (droplets U0 ~ 100 m/s) and standard room temperature gives a poor description of the flow (temperature drops etc). So I guess I will need to create my own solver in case there is none available (?). How should I proceed? As I see it there are two options: Convert the sprayFoam solver to be incompressible Add models to icoUncoupledKinematicParcelFoam Or maybe there is another solution which is easier? If someone could explain which way would be the easiest with a short motivation it would be highly appreciated. Thanks a lot!

September 19, 2016, 12:19	I am thinking the same	#2
jairoandres New Member Jairo A. Gutiérrez S Join Date: Nov 2014 Posts: 23 Rep Power: 8	Hi, I am just having the same inconvenient. I would like to ask you if you were able of converting sprayFoam to an incompressible case? I did CFD simulations using sprayFoam in a spray dryer a couple of years ago but I am very interested in knowing if you obtain sightly different results using a "incompressible" version.

March 26, 2019, 09:20	is there any solutions?	#4
Mh.Sui New Member Germany Join Date: Nov 2018 Posts: 5 Rep Power: 4	Hi, I also have this problem, did someone have done?

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June 25, 2018, 13:18		#3
Scram_1 Member Join Date: Oct 2015 Posts: 63 Rep Power: 7	Hey, Has anyone managed to solve this problem? I want to inject water droplets in my computational domain. What I have done is coupled pimpleFoam solver with icoUncoupledKinematicLagrangianFoam which means that my solver now can do transient particle tracking. I have also added the energy equation in the modified solver. Now, I want to study the evaporation of water droplets by considering an 'incompressible' evaporation model. Can someone help me out with this? Best, Scram_1

December 16, 2020, 00:39		#5
IC01 New Member Illia Join Date: Aug 2020 Posts: 9 Rep Power: 2	Hi guys. Is it 2020, anyone solved this inconvenience? Thank you