How to assign soil water content (soil moisture) for the porous media?

quangcuong_dhtl · January 5, 2016, 23:04

Hi all,
I'm using ANSYS CFX to model couple water and thermal transfer in soil media. CFX supplies porous media which can be used to model soil, however I don't know how to assign soil water content for the domain. are there anyone can help? Thank you very much

Cfdwarrior · October 31, 2019, 19:48

Hi everyone,
Does anyone know how to implement the Richards equation in Andy’s cfd or fluent. I am trying to model rain infiltration in soil. I want to know how the heat exchange rate changes as soil becomes more wet.
Thank you,

ghorrocks · October 31, 2019, 20:51

I have no idea what Richards equation is. But I might be able to implement it in Andy's cfd if you define it for me.

Make sure you are aware of the porous and solid material models available in CFX as you might be using them.

Cfdwarrior · January 20, 2020, 12:18

I think you can use the permeability and porosity in ANSYS CFX to run a soil model with water infiltration. The CFX model uses Darcy's Law so I don't quite know how much different it is from Richards equation.

January 5, 2016, 23:04		#1
quangcuong_dhtl New Member Bui Quang Cuong Join Date: Dec 2015 Posts: 1 Rep Power: 0	Hi all, I'm using ANSYS CFX to model couple water and thermal transfer in soil media. CFX supplies porous media which can be used to model soil, however I don't know how to assign soil water content for the domain. are there anyone can help? Thank you very much Last edited by wyldckat; January 6, 2016 at 18:43.

October 31, 2019, 19:48	Model moisture heat and transport in soil	#2
Cfdwarrior New Member Join Date: Oct 2019 Posts: 2 Rep Power: 0	Hi everyone, Does anyone know how to implement the Richards equation in Andy’s cfd or fluent. I am trying to model rain infiltration in soil. I want to know how the heat exchange rate changes as soil becomes more wet. Thank you,

October 31, 2019, 20:51		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	I have no idea what Richards equation is. But I might be able to implement it in Andy's cfd if you define it for me. Make sure you are aware of the porous and solid material models available in CFX as you might be using them. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

January 20, 2020, 12:18	CFX Soil Water Porosity model	#4
Cfdwarrior New Member Join Date: Oct 2019 Posts: 2 Rep Power: 0	I think you can use the permeability and porosity in ANSYS CFX to run a soil model with water infiltration. The CFX model uses Darcy's Law so I don't quite know how much different it is from Richards equation.

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