Model Gallery
Thermal Modeling of a Power Transformer
This model describes the temperature distribution in a coil-shaped power transformer which is cooled by forced flow of transformer oil from the bottom. The properties of the oil varies strongly with temperature, making modeling of the fluid flow in combination with the heat transfer necessary. The results show the position of the "hot spot", and that there is an unexpected radial flow ...
Shell Conduction
This model simulates a static analysis of heat conduction in a thin conductive shell. This is a benchmark model where the result is compared with a NAFEMS benchmark solution.
Heat Transfer in a Thin Plate
This example models heat transfer in a thin rectangular metal plate. Because the plate’s thickness is only 1/100 of its length and width, you can simulate the process using a 2D approximation. The plate has a fixed temperature at one end and is isolated at the other. A surrounding liquid cools the plate by convection. In addition, the model considers surface-to-ambient radiation.
Simulation of a Microrobot, 3D
A microrobot's leg, which structurally moves due to the rapid application of heat, is modeled in this example. Heat is generated by an electric current and propagates by conduction through the leg and, due to thermal expansion and different thermal expansion coefficients of the leg's materials, a bending action is induced. Thin layers of Al and SiO have also been modeled using a structural ...
RF-Heated Hot Wall Furnace for Semiconductor Processing
Furnace reactors are used in the fabrication of semiconductors to grow layers on wafers. These can also be used for epitaxial growth, which is a key technology for fabrication of electrical devices. A silicon carbide growth takes place in graphite susceptors at very high temperatures (~2000 oC), which are heated with RF coils. The design of the chamber is crucial to reach a uniform ...
Forced Turbulent Convection Cooling of a Hot Plate
This example shows how to model forced turbulent convection cooling with COMSOL Multiphysics. Two different approaches are demonstrated. The first one uses the K-epsilon Turbulent Flow interface together with the Heat Transfer interface. The second approach is a simplified one making use of the heat transfer coefficient library supplied with the Heat Transfer Module. In addition, this ...
Optimizing a Thermal Process
A thermal processing scenario is modeled whereby two heaters raise the temperature of a gas flowing through a channel. The Optimization Module is used to find the heater power to maximize the outflow temperature, while maintaining a constraint on the peak temperature at the heaters themselves.
Buoyancy–driven μPCR for DNA Amplification
Polymerase chain reaction (PCR) is one of the most effective methods in molecular biology, medical diagnostics, and biochemical engineering in amplifying a specific sequence of DNA. There has been a great interest in developing portable PCR-based lab-on-a-chip systems for point-of-care applications and one strategy that seems very promising is natural convection-based PCR. This model studies ...
