Heat Transfer in $$^{3}\hbox {He}$$ 3 He – $$^{4}\hbox {He}$$ 4 He Mixtures in Cylindrical Geometry

K. Nemchenko, S. Rogova, T. Vikhtinskaya
2017 Journal of Low Temperature Physics  
The effect of wall scattering on transport in dilute degenerate 3 He-4 He mixtures in quasi-2D flow channels or films is discussed. The calculation of the quasiparticle mean free path combines particle-wall and particle-particle collisions including the interference between them. The spin polarization affects the wall-driven contribution by changing bulk mean free path and particle wavelength. The expressions for the wall contribution to transport coefficients are especially transparent in the
more » ... imiting cases of large and small bulk mean free paths. The calculated temperature, concentration, and polarization dependences of the transport coefficients allow one to extract parameters of surface roughness from experimental data on transport.
doi:10.1007/s10909-017-1761-7 fatcat:4n64h3gatncpnhet3mtfhveggq