Microscopic calculation of the heat transfer between a granular structure and liquid3He |
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Authors: | D. Burton C. J. Lambert |
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Affiliation: | (1) Department of Physics, University of Lancaster, Lancaster, England |
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Abstract: | A recent formula for the heat transfer coefficient between3He quasiparticles and phonons of a sintered metallic powder is evaluated using the phonon density of states of a microscopic model of a granular structure. The microscopic model describes a simple crystalline granular structure and contains extended modes only. When the dominant phonon wavelength is less than a typical grain size, possesses a low-temperature enhancement typical of a sintered metallic powder and over a limited range exhibits a linear variation with temperature. |
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