Heat transfer in porous media considering phase change and capillarity—the heat pipe effect

Abstract A one-dimensional, steady state analysis of the heat and mass transfer in porous media saturated with the liquid and vapor phases of a single component fluid was conducted. The effects of capillarity, gravity forces, and phase change were included. Theoretical results were compared to experimental data with excellent agreement. It was found that the heat transfer was increased several orders of magnitude beyond pure conduction due to an evaporation, convection and condensation phenomenon similar to conventional heat pipe operation. The dry-out heat flux was predicted and verified for the bottom heating orientation. Theoretical temperature, pressure and saturation profiles within the two-phase region were obtained. Apparent thermal conductivities were evaluated for various gravitational orientations and medium permeabilities

[1]  Kenneth E. Torrance,et al.  Boiling in low-permeability porous materials , 1982 .

[2]  A. Luikov.  SYSTEMS OF DIFFERENTIAL EQUATIONS OF HEAT AND MASS TRANSFER IN CAPILLARY-POROUS BODIES (REVIEW) , 1975 .

[3]  M. Sahota,et al.  Heat and mass transfer in porous media subject to fires , 1979 .

[4]  Mohammad Faghri,et al.  A general analysis of moisture migration caused by temperature differences in an unsaturated porous medium , 1980 .

[5]  D. Turcotte,et al.  An experimental study of two‐phase convection in a porous medium with applications to geological problems , 1977 .

[6]  K. Cornwell,et al.  Observation of boiling in porous media , 1976 .

[7]  K. Udell,et al.  Heat transfer in porous media heated from above with evaporation, condensation, and capillary effects , 1983 .

[8]  R. J. Goldstein,et al.  A parametric study of boiling in a porous bed , 1982 .

[9]  L. Cavazza,et al.  The Movement of Soil Moisture in Response to Temperature Gradients1 , 1954 .

[10]  Irving Fatt,et al.  Effect of Fractional Wettability on Multiphase Flow Through Porous Media , 1959 .

[11]  H. Su.  Heat transfer in porous media with fluid phase changes , 1981 .

[12]  J. R. Philip,et al.  Moisture movement in porous materials under temperature gradients , 1957 .

[13]  C. L. Tien,et al.  Analysis of condensation in porous insulation , 1981 .

[14]  Otto Krischer,et al.  Die wissenschaftlichen Grundlagen der Trocknungstechnik , 1956 .

[15]  Vijay K. Dhir,et al.  Dryout Heat Fluxes for Inductively Heated Particulate Beds , 1977 .

[16]  A. J. Kelly,et al.  Neutron radiographic study of limiting planar heat pipe performance , 1970 .

[17]  M. C. Leverett,et al.  Capillary Behavior in Porous Solids , 1941 .