Multiphysics topology optimization scheme considering the evaporation cooling effect

•The evaporation cooling effect is modelled and analyzed.•The topology optimization considering the evaporation cooling is presented.•The optimized distribution of porous media is found.•The multiphysics system is solved by the finite element method. In this research, a new topology optimization sch...

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Bibliographic Details
Published in:Computers & structures 2021-02, Vol.244, p.106409, Article 106409
Main Author: Yoon, Gil Ho
Format: Article
Language:English
Subjects:
Adjoint sensitivity analysis
Computational fluid dynamics
Cooling effects
Evaporation
Evaporative cooling
Hot surfaces
Material properties
Moisture
Multiphysics system
Nonlinear equations
Optimization
Porous media
Topology optimization
Transportation
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Summary:•The evaporation cooling effect is modelled and analyzed.•The topology optimization considering the evaporation cooling is presented.•The optimized distribution of porous media is found.•The multiphysics system is solved by the finite element method. In this research, a new topology optimization scheme considering the evaporation cooling effect that cools air through the evaporation of liquid is presented. To efficiently cool down hot surfaces or products, it is a viable approach to use the evaporating cooling effect when water absorbs a large amount of heat on evaporating. To numerically consider the evaporating cooling effect, the three nonlinear governing equations, i.e., Navier–Stokes equation, heat transfer equation, and moisture transportation, should be coupled and analyzed; Air movement, temperature convection, and moisture transportation should be mutually coupled and analyzed. Due to the movement of air, the moisture inside porous media evaporates and the velocities, temperature, and moisture distributions of porous media are subject to be changed. From a topology optimization point of view, the material properties as well as the governing equations are interpolated with respect to the design variables defined at each finite element. After solving topology optimization problems, it is possible to find out the optimal distributions of porous media to control the states of the system. Through several numerical examples, the validity of the present topology optimization method is illustrated.
ISSN:0045-7949
1879-2243
DOI:10.1016/j.compstruc.2020.106409