Formula car isothermal radiator simulation

Mik511 · February 4, 2019, 20:01

Hi!

I'm trying to do an isothermal simulation for the radiator of a formula student car purely with aerodynamics interest in the mass flow rate that reaches the radiator inlet surface.

Can someone please help me setting the boundary conditions for the radiator body and its surfaces? Because with the conditions that I tried to use there's barely any airflow through the inlet surface. The radiator is being modeled like a block with interior mesh, an inlet, outlet and surrounding surfaces as can be seen in the image.

Thank you!!

Capturar.JPG

RaiderDoctor · February 5, 2019, 00:12

Why not try and split the fluid domain into two sections: one for the surrounding air, and one for the radiator set as a porous media? That way, you can still track the fluid passing through the radiator, but, due to the porous media setting, the flow rate will be slowed down substantially similar to real life.

I'm afraid I don't know what settings you should use specifically, though. Are there any papers that do something similar to this?

Mik511 · February 5, 2019, 06:59

Quote:

Originally Posted by RaiderDoctor

Why not try and split the fluid domain into two sections: one for the surrounding air, and one for the radiator set as a porous media? That way, you can still track the fluid passing through the radiator, but, due to the porous media setting, the flow rate will be slowed down substantially similar to real life.

I'm afraid I don't know what settings you should use specifically, though. Are there any papers that do something similar to this?

That's what I was trying to do. I defined the internal mesh of the radiator as a porous jump, but I believe that my problem lies in the setting attributed to the radiator surfaces. Should they be a porous jump as well?

I found this paper:

https://support.ansys.com/staticasse...ormula-car.pdf

RaiderDoctor · February 5, 2019, 20:04

You don't define any boundary surfaces as a "Porous Jump". You have your fluid body (the air surrounding your radiator and car), and then you have your porous body (your radiator). When you define your radiator as your porous body, that's basically it. Could you post a pic of the boundary conditions?

Mik511 · February 6, 2019, 16:51

Sure! Here are the pics concerning the radiator boundary conditions. The radiator inlet and outlet are defined as an interior type and the body inside the radiator (i.e. int_rad_bod) is defined as a porous jump as can be seen.

akucuk · February 7, 2019, 04:43

You dont need to define it as porous jump on only one surface but you should define the whole radiator as porous zone(in cell zones panel). That way you will have the connecting faces as interior.

February 4, 2019, 20:01	Formula car isothermal radiator simulation	#1
Mik511 New Member Join Date: Jan 2017 Posts: 6 Rep Power: 9	Hi! I'm trying to do an isothermal simulation for the radiator of a formula student car purely with aerodynamics interest in the mass flow rate that reaches the radiator inlet surface. Can someone please help me setting the boundary conditions for the radiator body and its surfaces? Because with the conditions that I tried to use there's barely any airflow through the inlet surface. The radiator is being modeled like a block with interior mesh, an inlet, outlet and surrounding surfaces as can be seen in the image. Thank you!! Capturar.JPG

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February 5, 2019, 00:12		#2
RaiderDoctor Senior Member Join Date: Dec 2016 Posts: 152 Rep Power: 10	Why not try and split the fluid domain into two sections: one for the surrounding air, and one for the radiator set as a porous media? That way, you can still track the fluid passing through the radiator, but, due to the porous media setting, the flow rate will be slowed down substantially similar to real life. I'm afraid I don't know what settings you should use specifically, though. Are there any papers that do something similar to this?

February 5, 2019, 20:04		#4
RaiderDoctor Senior Member Join Date: Dec 2016 Posts: 152 Rep Power: 10	You don't define any boundary surfaces as a "Porous Jump". You have your fluid body (the air surrounding your radiator and car), and then you have your porous body (your radiator). When you define your radiator as your porous body, that's basically it. Could you post a pic of the boundary conditions?

February 7, 2019, 04:43		#6
akucuk New Member Aykut Kucuk Join Date: Nov 2018 Posts: 4 Rep Power: 8	You dont need to define it as porous jump on only one surface but you should define the whole radiator as porous zone(in cell zones panel). That way you will have the connecting faces as interior.