Two - component / Double Diffusive Marangoni (DDM) convection with Dufour effects, in a two-layered system, has been studied analytically by using Darcy – Brinkmann Model. For fluid layer, the upper boundary is free surface tension depending on both temperature and concentration, for porous layer lower rigid boundaries are insulating to heat mass. At interface, normal velocity, stress, shear ma...

Duct flows constitute an important category of modern thermal engineering. Optimizing efficiency has become a significant objective in the 21st century in, for example, heating ventilation and air-conditioning (HVAC), coolant or heat transfer fluid nuclear power reactor, exchanger design etc., this been achieved by either new materials (improved insulation properties) constituting duct walls, n...