{"id":50443,"date":"2022-04-29T18:05:37","date_gmt":"2022-04-29T18:05:37","guid":{"rendered":"https:\/\/www.simscale.com\/?page_id=50443"},"modified":"2025-09-09T15:10:00","modified_gmt":"2025-09-09T15:10:00","slug":"conjugate-heat-transfer-ibm","status":"publish","type":"page","link":"https:\/\/www.simscale.com\/docs\/analysis-types\/conjugate-heat-transfer-ibm\/","title":{"rendered":"Conjugate Heat Transfer (IBM)"},"content":{"rendered":"\n

The Conjugate Heat Transfer (IBM)<\/strong> (Immersed Boundary Method)<\/strong> analysis type allows for the simulation of heat transfer between solid<\/strong> and fluid<\/strong> domains by exchanging thermal energy at the interfaces between them. Typical applications of this analysis type exist as but are not limited to, the simulation of heat exchangers, cooling of electronic equipment, and general-purpose cooling and heating systems. <\/p>\n\n\n\n

The difference to the Conjugate Heat Transfer is that the IBM is resilient to complex geometrical details and does not require CAD simplification.<\/p>\n\n\n\n\n\n\n

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Figure 1: Natural convection around an LED Spotlight. <\/figcaption><\/figure>\n\n\n\n

The following section will explain the step-by-step procedure to set up a conjugate heat transfer (IBM) simulation within the SimScale platform:<\/p>\n\n\n\n

Creating a Conjugate Heat Transfer (IBM) Analysis<\/h2>\n\n\n\n

To create a CHT (IBM) analysis, first, select the desired geometry and click on \u2018Create Simulation\u2019<\/strong>:<\/p>\n\n\n

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Figure 2: Steps to create a simulation in SimScale.<\/figcaption><\/figure>\n<\/div>\n\n\n

Please note that .stl models are not supported for CHT (IBM) analyses. A list of alternative supported CAD formats can be found here<\/a>. <\/p>\n\n\n\n

Next, a window with a list of analysis types supported in SimScale will be displayed:<\/p>\n\n\n\n

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Figure 3: Select Conjugate Heat Transfer <\/em>(IBM) analysis type from the tree above and click on ‘Create Simulation’<\/strong> at the bottom.<\/figcaption><\/figure>\n\n\n\n

Choose Conjugate Heat Transfer (IBM)<\/em> analysis type and click on \u2018Create Simulation\u2019<\/strong>. This will lead to Workbench for the simulation with the following simulation tree and the respective settings:<\/p>\n\n\n

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Figure 4: Simulation tree for CHT (IBM) analysis<\/figcaption><\/figure>\n<\/div>\n\n\n

Global Settings<\/h2>\n\n\n\n

To access the global settings, click on ‘Conjugate Heat Transfer (IBM)’<\/strong> in the simulation tree. It consists of certain parameters that can be selected to define the simulation. The parameters are listed below:<\/p>\n\n\n\n