STAR-CCM+ Tutorial | Conjugate Heat Transfer | Part 7 – Solid Fluid Interfaces | 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
– Subscribe to *Abecator CFD* for more STAR-CCM+ and CFD tutorials
– Leave a comment with your questions or suggested future topics


In the previous sections, we created our *regions**, generated the **mesh**, and defined the **physics continua* for both the gas and the manifold.

If you remember, we also discussed that we want an *interface* between the two regions, and ideally a **conformal mesh**, so that information can be transferred cleanly from one computational region to the other.

When we created the regions together, we enabled the option for STAR-CCM+ to automatically create an interface.
If you look in the **simulation tree**, you’ll now see a folder called **Interfaces**.

Inside that folder, you’ll find the interface that has been created between the *Gas* region and the *Manifold* region.
If you click on it, it’s highlighted in yellow in the graphics window, showing the common surface where information is exchanged between the two domains.

Under normal circumstances, if the *time treatment* of the gas and the solid were the same—meaning both were *steady* or both were **unsteady**—then the default settings would be fine.
In that case, STAR-CCM+ would automatically transfer the data across the interface each time step or iteration without any additional work from us.

However, in this example we are doing **multi–time-scale modelling**:

The *fluid (gas)* is solved as a *steady-state* problem.
The *solid (manifold)* is solved as a *transient (unsteady)* problem.

Because the time treatment is different, we need to tell STAR-CCM+ *how* to transfer information across this interface.

---

Changing the Interface Type to Mapped Contact

In the *Gas–Manifold interface* folder, open the interface you created.

There is a setting called *“Set Type”* (or **Contact Type**), which is currently set to **Contact Interface**.


#STARCCM #CFD #ConjugateHeatTransfer #CHT #HeatTransfer #ThermalSimulation #EngineeringSimulation #CFDtutorial #AbecatorCFD
STAR-CCM+ tutorial for beginners, how to set up a CFD simulation in STAR-CCM+, oil–air multiphase flow around a gearbox in STAR-CCM+, conjugate heat transfer simulation in STAR-CCM+ step by step, external aerodynamics simulation of an airplane in STAR-CCM+, learn CFD from scratch using STAR-CCM+, CFD project ideas for students in STAR-CCM+
CFD English tutorial, bilingual CFD channel, step by step CFD tutorial, complete CFD course, full STAR CCM course
CFD for mechanical engineers, CFD for students, CFD for researchers, mechanical engineering tutorials, aerospace engineering tutorials, automotive CFD, academic CFD projects, industry CFD project
CFD for beginners, CFD for engineers, external aerodynamics, internal flow simulation, heat transfer simulation, conjugate heat transfer, multiphase flow, oil lubrication simulation, gearbox oil splash, turbulence modeling, RANS simulation, mesh generation, mesh quality, boundary conditions, post processing CFD
STAR-CCM+, STAR CCM tutorial, STAR CCM plus tutorial, Siemens STAR CCM, Siemens Simcenter STAR-CCM+, STAR CCM beginner, STAR CCM+ for beginners, STAR CCM mesoshing, STAR CCM multiphase, STAR CCM conjugate heat transfer, STAR CCM external aerodynamics, STAR CCM gearbox lubrication
Abecator CFD, Abecator, CFD tutorials, CFD training, Computational Fluid Dynamics, engineering simulation, simulation tutorials, CAE tutorials
#STARCCM #CFD #Gearbox #Lubrication #MultiphaseFlow #OilSplash #GearboxSimulation #EngineeringSimulation #AbecatorCFD