Abstract
He II flow experiments are always done in restricted geometries where boundary layers are formed at the walls. The knowledge of the influence of the boundary on the temperature and velocity distribution is necessary for the proper interpretation of the local experimental data taken often at the walls. The nonstationary two-dimensional flow in channels was modelled numerically, assuming different boundary conditions, and compared with the measured values of the second sound wave curvature in a rectangular channel. The influence of the boundary layer losses on the temperature gradient in a large rectangular channel are also compared with experimental observations.
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