The reduction of pressure losses in thermally modulated vertical channels

The role played by patterned heating in reducing pressure losses within vertical conduits is investigated. generates flow separation structures which reduce the direct contact between stream and sidewalls, thereby limiting frictional resistance. This also modifies temperature field inducing a net buoyancy force may either assist or oppose gradient required to maintain fixed rate. If Reynolds number increased sufficiently, be washed away, means that pressure-gradient-reducing mechanism eliminated. details of system response are function form spatial distribution, its intensity, fluid Prandtl number. Carefully chosen two walls can induce pattern interaction effect judicious choice patterns have as much an order magnitude on response.