Research progress on heat transfer modeling simulation of mesophase-pitch-derived carbon foam
Carbon foam is regarded as an excellent thermal management material because of its good structural properties and strong ad-justability,and has broad application prospects.Based on the nature of its porous material,the relationship between thermal conductivity and structure has become a research focus.Heat transfer modeling and simulation can guide the further improvement and design of carbon foam pore structure and preparation method.This paper summarizes the geometric structure basis and anisotropy characteristics of carbon foam heat transfer simulation research,introduces several existing carbon foam heat transfer simulation idealized models and anisotropy models,expounds the basic theory and simulation methods of carbon foam heat transfer finite element research,and sorts out the methods to verify the effectiveness of the geometric model and heat transfer simulation structure.Finally,the development direction of carbon foam heat transfer modeling and simulation is prospected.The authors believe that the heat transfer simulation of carbon foam should be based on its porous geometric structure and geometric parameters,and the main difficulties are the anisotropy determined by the pores structure and the properties of graphite itself.The existing ideal geometric models mainly include face-centered cubic model,body-centered cubic model,tetrahedral model,octahedral model,random distribution model,random algorithm model,and regular tetrahedral model.Anisotropic models mainly include ellipsoidal body-centered cubic model,foaming mechanism model,Kelvin tetrahedron model and three-dimensional computed tomography model,all of which have important reference value for the heat transfer research of carbon foam.The fi-nite element research of carbon foam heat transfer generally uses ANSYS or ABAQUS software to calculate the thermal conductivity of its solid skeleton.The validity of the model can be verified by using experimental measurement data or Klett theory model.Since the carbon foam graphite lamellar structure cannot be realized by macroscopic geometric modeling,it is necessary to develop more accurate heat transfer simulation methods for anisotropic porous materials,and study the relationship between the order of the carbon foam graphite liga-ment and lamellar arrangement,its preparation conditions and effective thermal conductivity,for further studying the anisotropic heat transfer mechanism of carbon foam.
Carbon foamgeometric modelanisotropyfinite elementheat transfer modeling and simulation
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