heat transfer between cylinder volumes

Hello;

I have three cylindrical masses with a radius of 9 mm and a height of 65 mm. Their locations are [0 0 0] [20 0 0] [10 20 0]. The cylinder at position [20 0 0] has heat production load and I know the instantaneous temperature change. There is no contact between the cylinders. Heat transfer between cylinders will be by convection, conduction and radiation will be neglected. I want to analyze the effect of the temperature of this cylinder on other cylinders. The initial temperature of all cylinders is 30 C and there is heat transfer by convection between the cylinders.

Could you help me.

Thank you for your attention

[Dyuman Joshi]

How is your question related to MATLAB?

[sevgi]

I want to analyze it numerically using the finite element method by making the necessary definitions in Matlab.

[Torsten]

What is the unit for the locations ? Also mm ?

If you really want to model the fluid dynamics of this problem by taking free convection and maybe radiation between the surfaces into account, this project has the potential for a doctoral thesis (and will take a long time to finish). I suggest using a CFD code, e.g. ANSYS, in this case.

[sevgi]

I want to do heat transfer analysis like the analysis in the link. I wanted to compare the analysis I did with Star CCM with Matlab numerical analysis. After the Autocad STL geometry importing , I saw that the surface was divided into too many parts, so I wanted to create the cylinder volumes here since the geometry was simple.

https://www.mathworks.com/videos/finite-element-analysis-in-matlab-part-2-heat-transfer-using-finite-element-method-in-matlab-1600851714895.html?s_tid=vid_pers_recs

[Torsten]

Stick to STAR CCM or another CFD program. MATLAB's PDE toolbox does not solve fluid dynamics problems.

If MATLAB talks about "Heat Transfer", it means heat transfer by conduction. This is not relevant in your case.

[sevgi]

If we consider the situation as conduction, can you guide me for conduction?

We can also think that the cylinders as not in contact with each other, but as placed in a slot that will allow interaction between them. or we can define a volume with cylindrical slots and a temperature on one of these cylindrical surfaces.

[Torsten]

So you want to define your problem according to what MATLAB is able to handle ?

I have no experience with the PDE Toolbox, so I cannot help you to set up your redefined problem.

But I definitely know that the PDE Toolbox doesn't solve CFD problems.

[sevgi]

Yes, I want to define the problem according to what MATLAB is able to handle ?

thank you for your interest.

[Torsten]

Yes, I want to define the problem according to what MATLAB is able to handle ?

Then your problem cannot be that important.

[Precise Simulation]

For reference, this should be possible using the FEATool toolbox, see for example the tutorial:

https://featool.com/model-showcase/06_Multiphysics_09_multi_simulation1

Answer 1

[Chaitanya]

Hello sevgi

I understand that you are looking for a way to analyze heat transfer between cylinders through means of convection.

I would like to point out an example model that provides a way to analyze heat transfer in an iron rod via conduction and convection.

https://www.mathworks.com/help/simscape/ug/heat-conduction-through-iron-rod.html#responsive_offcanvas

The below example deals with convection, that can be useful in your case.

https://www.mathworks.com/help/simscape/ug/heat-conduction-through-iron-rod.html#HeatConductionThroughIronRodExample-4

I hope that these example models can help you in analyzing heat transfer as per your requirements.

Thanks,

Chaitanya