Numerical analysis of heat transfer in enhanced duct

Numerical analysis were made to determine convection heat transfer and pressure drop characteristics for corrugated ducts which are basic channel geometry in plate heat exchanger because of their efficient heat exchange capabilities. They consist of pack of rectangular pressed plates, suspended vertically and clamped together in a frame by tie bars or screws. The plates produce turbulance at low velocities because the fluid flow with many abrupt changes in direction and velocities. The turbulence, created by the shape of the plate pattern, reduces the liquid film resistance to heat transfer more efficiently than turbulance created by high flow rates and pressure in conventional heat exchangers.The forced convection heat transfer coefficients and friction factor in converging-diverging ducts were determined numerically for air, in the Reynolds numbers range of 2076-6886. Using ANSYS finite element software with CFD codes (Computational Fluid Dynamic), numerical analysis were made for the problem, assumed to be two- dimensional with constant properties of air and compared with experimental data.