[Sam_CFD]

Deat All,

I am new to OpenFOAM. Could you please help me to select a proper solver for the following problem.

My problem is
1. Incompressible
2. High pressure ( 200 Bar at inlet and outlet 1 bar)
3. 3 phases involved (Beginning only Air and Liquid later Liquid-vapour formation)
4. Steady State

I have attached a pic which is similar to my model. That pic is only at initial condition.
As iterations go on, there exist liquid-vapour phase as liquid gets evaporated. Sometime cavitation also comes into picture.

Please suggest me the solver which suits my condition.

Regards,
Sam

[hajott]

Originally Posted by Sam_CFD

3. 3 phases involved (Beginning only Air and Liquid later Liquid-vapour formation)

Is the vapour and the air immiscible? Otherwise you have a 2-phase problem and can use any of the VOF-solvers.

[Sam_CFD]

Originally Posted by hajott

Is the vapour and the air immiscible? Otherwise you have a 2-phase problem and can use any of the VOF-solvers.

They are immiscible.

Could you please mention the solver name ?

[hajott]

Have a look in $FOAM_SOLVERS/multiphase, whether you find a 3-phase solver. As I said, I have only used 2-phase solvers.

What is the chemical composition of the liquid?

[olivierG]

Hello,

Take a look at "cavitatingFoam", or "interPhaseChangeFoam".

regards,
olivier

[Sam_CFD]

Originally Posted by hajott

Have a look in $FOAM_SOLVERS/multiphase, whether you find a 3-phase solver. As I said, I have only used 2-phase solvers.

What is the chemical composition of the liquid?

Liquid is Methanol .

[hajott]

Originally Posted by Sam_CFD

Liquid is Methanol .

You will have a liquid methanol phase and a vapor phase consisting of air and methanol. Do you have a reference that suggests why there should be a third phase?

[Sam_CFD]

Originally Posted by hajott

You will have a liquid methanol phase and a vapor phase consisting of air and methanol. Do you have a reference that suggests why there should be a third phase?

Yes It is said that after the some liquid get evaporated when it passes through nozzle.

Because of sudden drop in the pressure.

[hajott]

Originally Posted by Sam_CFD

Yes It is said that after the some liquid get evaporated when it passes through nozzle.

Because of sudden drop in the pressure.

As you say: the liquid evaporates. Afterwards it is in the vapor phase and mixes with air. Please give your reference, or it doesn't make sense to discuss this.

[Sam_CFD]

Originally Posted by hajott

As you say: the liquid evaporates. Afterwards it is in the vapor phase and mixes with air. Please give your reference, or it doesn't make sense to discuss this.

I am not able to get the meaning of "Your reference" in your post.
Could you please elaborate ?

[hajott]

Originally Posted by Sam_CFD

I am not able to get the meaning of "Your reference" in your post.
Could you please elaborate ?

I though you have some publication that explains why you expect three phases. This is what I mean by "reference".

Good luck with your project. I am out of this discussion.

[Sam_CFD]

Originally Posted by hajott

I though you have some publication that explains why you expect three phases. This is what I mean by "reference".

Good luck with your project. I am out of this discussion.

The reference is CFX-pre file provided to me where the initiallisation is done with 2 phases but another phase called liquid-vapour is also included.