A COUPLED BOUNDARY CONDITION FOR THERMAL-FLUID CONJUGATE HEAT TRANSFER ANALYSIS

Resumo

© 2025, Begell House Inc.. All rights reserved.This study presents an in-depth examination of a three-dimensional conjugate heat transfer (CHT) model within a cubic cavity containing a solid cubic insert, engineered to investigate the thermal interaction at the fluid-solid interface. The thermal gradient induced across the cavity’s walls initiates fluid motion via natural convection, effectively modeled using the Boussinesq approximation to address the fluid’s thermally induced density variations. Central to this research is the development of an innovative CHT approach that employs a coupled boundary condition, integrating the heat conduction equations of the solid and the thermal-fluid dynamics equations of the fluid into a seamless analytical framework. This integration not only facilitates a comprehensive analysis of the fluid-solid interface but also enhances the accuracy and coherence of the simulation results. By treating the solid and fluid components as interconnected systems through the coupled boundary condition, the study demonstrates significant improvements in the predictability of temperature distribution and flow patterns within the cavity. Validation against established benchmarks confirms the model’s superior capability in capturing complex interactions at the fluid-solid boundary, highlighting its potential to advance thermal management strategies across a variety of engineering applications. The paper underscores the efficiency and reliability of the new approach, showcasing its value in providing more detailed insights into the intricate dynamics of heat transfer and fluid movements, crucial for optimizing design processes in both academic research and industrial practice.

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