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Radtiation System Coupling Ansys

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Old   July 3, 2020, 08:54
Default Radtiation System Coupling Ansys
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My system consists of Fluent and Transient Structural. My goal is to pass on a heat flow consisting of radiation from Fluent to Mechanical. For this, Fluent gives the heat flow to Mechanical and Mechanical gives the wall temperature to Fluent. In addition, the cells in Mechanical were converted into "SOLID226" elements.

Unfortunately there is no heat exchange. Is there a way or is this ability not supported?
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Old   July 3, 2020, 13:53
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Gwenael H.
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Hi,



First to start with, how did you setup your models in Workbench? There are different ways to transfer data between the systems to achieve what you need.


The Solid226 with the proper keyopt shouldn't be a limitation
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Old   July 3, 2020, 18:42
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Thanks for your Reply,

In Mechanical I have a fluid-solid interface that receives the heat flow from Fluent. This interface is a Wall BC in Fluent. This is selected in the thermal as system coupling. Fluent recives Mechanical's interface temperature. The DO is used as the radiation model.
Which Keyopts do I need? Keyopts(2) and (6) are set to 1
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Old   July 6, 2020, 02:11
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Ok, just to be sure, you are using 3 systems:

- Fluent
- Transient Structural
- System coupling

The Fluent and Transient Structural setups cells should be connected to the setup cell of the system coupling.

In Mechanical you need to define the solid226 element with keyopt 1 = 11 as you want to perform a thermal-structural analysis (DOF, Ux, Uy, Uz, Temp).

Add a fluid solid interface and define the transfer to "All System Coupling Data Transfers".

Then in the system coupling you should define which load is transfer to the particular systems (Fluent / Transient Structural).

This should do the trick,

Have fun
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Old   July 7, 2020, 01:59
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Thats more or less the exact setup of my calculation. Additional Keyopt(9)=1 and I have on the Interface a radiation AND convection heat flow. Could this be the problem that there can be just one heat flow?
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Old   July 8, 2020, 02:52
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If you're using surf152 element at that boundary it shouldn't be a problem as you can use them to define both radiation and convection.

Do you get any warning / error message from the coupling system or any of the Fluent / Mechanical setups ?
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Old   July 9, 2020, 12:43
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There are no warnings regarding radiation.

I didn't specifically define the BC as a SURF152 Element. But I will give it a try.

Is there a command for defining a named selection?
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Old   July 22, 2020, 05:11
Default radiated coupling
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Radiated coupling results when electromagnetic energy is emitted from a source, propagates to the far-field, and induces voltages and currents in another circuit. Unlike common impedance coupling, no conducted path is required.
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