Dimples are small concavities imprinted on a flat surface. known to affect heat transfer and also flow separation and aerodynamic drag on bluff bodies when acting as a standard roughness. Recently. dimples have been proposed as a roughness pattern that is capable of reducing the turbulent drag of a flat plate by providing a reduction of skin friction that compensates the dimple-induce... https://allfixelectricales.shop/product-category/evaporator-deflector/