TY - EJOU
AU - Yu, Ping
AU - Huang, Chuanhui
AU - Liu, Lei
AU - Guo, Huafeng
AU - Liu, Chengqiang
TI - Heat and Mass Transfer Characteristics of Alkali Metals in a Combined Wick of High-Temperature Heat Pipe
T2 - Fluid Dynamics \& Materials Processing
PY - 2020
VL - 16
IS - 2
SN - 1555-2578
AB - To study the heat and mass transfer characteristics of alkali metals in a
combined porous wick in high-temperature heat pipes, a three-dimensional (3-D)
numerical model is constructed by using the finite volume method, Darcy’s theory, and
the theory of local thermal equilibrium. The research finds that the pressure drop of
fluids flowing through a combined porous wick exhibits an increasing trend with
increasing flow velocity at the inlet and with decreasing permeability of the porous
media; a combined porous wick of lower porosity and permeability and larger fluid
velocity at the inlet is found to have a less uniformly distributed fluid velocity; the
different temperatures of the fluid at the inlet mainly influence the inlet section of the
computational model, while having negligible effect thereon in the axial direction (this
embodies the thermal homogeneity of such heat pipes). The result reveals that the
temperature change in fluids at the inlet does not significantly affect the overall
temperature distribution in a combined wick.
KW - Porous medium
KW - heat pipe
KW - numerical simulation
KW - combined wick
DO - 10.32604/fdmp.2020.06528