Experimental investigation of mass transfer in 90° pipe bends using a dissolvable wall technique

The mass transfer in 90° angle bends was measured using a dissolvable wall technique using test sections cast from gypsum. The method allows the surface morphology to evolve producing a roughened surface to mimic practical mass transfer situations. The experiments were performed for standard 90° pipe bends, with a diameter of 2.54cm and radius of curvature r/D=1.5 at a Schmidt number of 1280 and Reynolds number in the range Re=40,000–130,000. A …