Laminar forced convective heat transfer to near-critical water in a tube |
| |
Authors: | Email author" target="_blank">Sang-Ho?LeeEmail author |
| |
Affiliation: | (1) Division of Mechanical System and Design Engineering, Wonkwang University, 570-749 Iksan, Chonbuk, Korea |
| |
Abstract: | Numerical modeling is carried out to investigate forced convective heat transfer to nearcritical water in developing laminar
flow through a circular tube. Due to large variations of thermo-physical properties such as density, specific heat, viscosity,
and thermal conductivity near thermodynamic critical point, heat transfer characteristics show quite different behavior compared
with pure forced convection. With flow acceleration along the tube unusual behavior of heat transfer coefficient and friction
factor occurs when the fluid enthalpy passes through pseudocritical point of pressure in the tube. There is also a transition
behavior from liquid-like phase to gas-like phase in the developing region. Numerical results with constant heat flux boundary
conditions are obtained for reduced pressures from 1.09 to 1.99. Graphical results for velocity, temperature, and heat transfer
coefficient with Stanton number are presented and analyzed. |
| |
Keywords: | Near-Critical Water Convective Heat Transfer Pseudocritical Point Thermo-Physical Properties |
本文献已被 SpringerLink 等数据库收录! |
|