Numerical Simulation on flow characteristics of the supercritical fluid in Micro-Fin Tube

The flow characteristics of the supercritical fluid in micro-fin tube is theoretical basis for development heat transfer enhancement and resistance reduction tube. For tubes with different fin shapes, this paper considered physical properties nitrogen state adopted enhanced wall function, reasonable turbulence equations, control etc., to numerically simulate a 2 mm under pressure. distribution velocity field, pressure field was analyzed. turbulent mechanism micro-fins obtained, it found that existence viscous bottom layer slows down inter-costal increases frictional during process.