Numerical investigation of flow field and heat transfer in cross-corrugated ducts

Flow field and heat transfer in sine-wave crossed-corrugated ducts have bee n investigated by numerical solution of the Navier-Stokes and energy equati ons in the laminar and transitional flow regime between Re = 170 and 2000. The ratio of the corrugation wave length lambda* to amplitude a* has been v aried between 7 and 10. The angle of the corrugation of the neighboring pla tes has been kept fired at 45 deg. Results show that the critical Reynolds number for self-sustained flow oscillations is about 240. For Reynolds numb ers larger than 1000, the Nusselt number and the friction factor are nearly independent of the dimensionless wavelength, Computational results compare well with available experimental results.