Experimental and numerical examination of confined laminar opposed jets part II. Momentum balancing

Abstract

Impingement of laminar fluid jets in a confined cylindrical chamber is examined using steady and unsteady three dimensional finite volume numerical simulations using boundary fitted non-orthogonal coordinates. The results presented here deal with modifying an existing flow imbalance and suggest alternative momentum arrangements to improve the flow characteristics. Unequal flow cases in an opposed two jet configuration indicate an asymmetric flow field with significant downward recirculation from the region away from the nozzles to the nozzle region and a jet-to-jet impingement point very close to the low flow rate nozzle. Large areas of recirculation in the flow direction of the chamber will lead to poor mixing due to the possibility of unmixed fluid leaving the chamber and the increase in the residence time of the mixing fluids.