Abstract
The dependence of the heat transfer on pressure is studied for a horizontal plane surface in liquid helium, liquid hydrogen, and liquid nitrogen in the range 0.03 < p/ p c < 0.9: a maximum of the maximum heat flux density q̇ m,m was found at ∼0.35 p c. For helium, additionally, the dependence on the inclination of the surface against the horizontal was determined. A general representation for the dependence of the reduced maximum heat flux density q̇ m/q m,m on the reduced pressure p/ p c is given which also describes adequately well the results obtained with other cryogenic liquids.
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