lnfluences of Hydrostatic Bath Pressure, van der waals Pressure, and Fountain Pressure on the Heat Transfer in a Bath of Superfluid Helium

摘要

Shanghai Jiao Tong University, People's Republic of China Considering the basic heat transfer rules of superfluid helium and the phase diagram of helium, pressure effects on heat transfer to HeII are especially studied. If the bath pressure is less than λ-pressure (Pλ), special peak heat flux density relations are shown to correlate bath pressure, hydrostatic head, and modified pressure items (van der Waals pressure and fountain pressure). If the bath pressure is greater than λ-pressure (P > Pλ), a generalized formula of Peak flux density of HeIIp bath is shown.