Measurement and correlation of volumetric heat transfer coefficients of cellular ceramics |
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Authors: | XFu R Viskanta JP Gore |
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Institution: | School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA |
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Abstract: | The volumetric heat transfer coefficients (hv) between cellular ceramics and a stream of air were measured using the single-blow transient experimental technique in conjunction with an inverse analysis. Test specimen made of mullite, YZA, SiC, cordierite and cordierite with LS-2 coating was studied. The number of pores per centimeter (PPC) ranged from 4 to 26 and the specimen thickness ranged from 6 to 12 mm. Based on the experimental data, the volumetric heat transfer coefficients were generalized by developing Nusselt number vs. Reynolds number correlations of the form Nuv=C Rem for the materials studied. The effects of pore length-scale and specimen thickness on the volumetric heat transfer coefficients are presented and discussed. |
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Keywords: | Volumetric heat transfer coefficient Cellular ceramics Porous media Convective coefficient correlation |
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