STAR-CCM+ Tutorial | Conjugate Heat Transfer | Part 10 – Threshold for Visualization | Advanced

In this STAR-CCM+ tutorial, we demonstrate how to model conjugate heat transfer (CHT) between a solid and a gas.
The video covers the complete workflow, from region definition and interface creation to physics setup and post-processing of temperature and heat flux.

This tutorial is ideal for anyone learning thermal CFD simulations in STAR-CCM+, especially applications involving solid–fluid heat exchange.

🔹 What you’ll learn
0:00 Introduction to conjugate heat transfer (CHT)
0:XX Geometry and region setup (solid and gas)
0:XX Creating solid–fluid interfaces
0:XX Material properties and thermal models
0:XX Meshing strategy for CHT simulations
0:XX Solver settings and convergence monitoring
0:XX Post-processing temperature fields and heat flux
0:XX Common pitfalls and best-practice tips

📂 Case details
– Software: Simcenter STAR-CCM+
– Topic: Conjugate heat transfer between solid and gas
– Physics: Energy equation, heat conduction, convection
– Outputs: Temperature distribution, heat flux, thermal gradients

🎓 About this series – Abecator CFD
This video is part of the STAR-CCM+ tutorial series on the Abecator CFD channel.
The series focuses on practical engineering simulations to help students, researchers, and engineers build strong CFD fundamentals.

👍 Support the channel
– Like the video if it helped you
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– Leave a comment with your questions or suggested future topics


In this part of the exercise, we’re going to set up some **post-processing tools**, specifically **Thresholds**, so that once the solution is finished, we can look at the results with **high quality and good accuracy**.

What I want to do is go into the *Derived Parts* and create a **Threshold**. Based on that Threshold, we’ll tell STAR-CCM+ to **only display certain cells**, for example, cells in a specific region of the geometry.

When I click on *Threshold**, the **Properties* panel opens and shows the settings related to this Threshold.

The first thing it asks is:

“On which parts do you want to apply this Threshold?”

Here, I keep both the *Gas* and *Manifold* parts selected, because I want the Threshold to be applied to both of them.

The next question is:

“Which scalar do you want to use for the Threshold?”

In other words:

“Based on which scalar field do you want to select your cells?”

The scalar I want to use is the **Position**.
When you expand **Position**, you can either select:

*Magnitude of Position* (the overall coordinate magnitude), or
One of the individual components: **X**, **Y**, or **Z**.

In this example, for the first Threshold, I’m going to use the **Z component**.
So I select *Position → Z* and click **OK**.

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