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Updated: Jul 4, 2026
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Comparative Study of Simulation of Temperature Rise in Ring Main Unit
Published on: July 5, 2024
High frequency electromagnetism, heat transfer and fluid flow coupling in ANSYS multiphysics
Cristina M Sabliov1, Deepti A Salvi, Dorin Boldor
1Biological and Agricultural Engineering Department, Louisiana State University Agricultural Center, Baton Rouge, LA, USA. CSabliov@agcenter.lsu.edu
Summary
This study numerically predicts liquid heating in microwave systems. Lower flow rates significantly increase water temperature, with peak temperatures near the tube center.
Area of Science:
- Multiphysics simulation
- Microwave engineering
- Heat transfer
Background:
- Continuous-flow microwave heating is crucial for industrial processes.
- Accurate temperature prediction is essential for process control and optimization.
- Numerical modeling offers a powerful tool for understanding complex heating dynamics.
Purpose of the Study:
- To numerically predict the temperature of a liquid product heated in a continuous-flow microwave system.
- To couple high-frequency electromagnetism, heat transfer, and fluid flow using ANSYS Multiphysics.
- To assess the influence of flow rates on temperature distribution in water.
Main Methods:
- Developed a coupled numerical model in ANSYS Multiphysics.
- Simulated water heating in a 915 MHz microwave unit under steady-state conditions.
- Analyzed the effect of varying flow rates (1 L/min and 2 L/min) on temperature profiles.
Main Results:
- Water temperature increased from 25°C to 34°C at 2 L/min and to 42°C at 1 L/min.
- Highest temperatures were observed near the tube center, decreasing radially outwards.
- A slight temperature increase near the tube wall was noted, consistent with Mathieu function energy distribution.
Conclusions:
- The developed ANSYS Multiphysics model accurately predicts temperature distribution in microwave-heated liquids.
- Flow rate is a critical parameter influencing the heating efficiency and temperature profile.
- The model provides a foundation for future studies incorporating more complex physical phenomena.
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