Title: Novel rotating cone viscous micro pump

Authors: Khaled M. Bataineh; Yazan Taamneh

Addresses: Department of Mechanical Engineering, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110, Jordan ' Department of Mechanical Engineering, Tafila Technical University, P.O. Box 179, Tafila, 66110, Jordan

Abstract: This paper presents numerical solution for Navier-Stokes equations coupled with energy equation for gaseous slip flow between two concentric micro rotating cone pump. The inner cone is rotating while the outer is held stationary. A first-order slip boundary condition is applied. The effect of Kn, rotational speed and cone angle on pressure rise, flow rate, coefficient of moments and pump efficiency are studied. Slip values are found to be major parameters that affect the performance of pump. Four values of Kn are studied; Kn = 0, 0.001, 0.01 and 0.1. Optimal pump performance corresponds to Kn = 0.01. For all values of Kn, pressure rise is inversely proportional to flow rate. Increasing Kn reduces the slope of ΔP - Q curves. Both maximum flow rate and maximum pressure rise increase with rotational speed. Three values of cone angle ß were studied, namely, 9°, 14° and 18°. Optimal performance is obtained for ß = 14°.

Keywords: microfluidics; viscous micro pumps; slip flow; rotating cone; computational fluid dynamics; CFD; Navier-Stokes equations; energy equations; gaseous slip flow; pump performance; pressure rise; flow rate; rotational speed.

DOI: 10.1504/IJESMS.2013.056770

International Journal of Engineering Systems Modelling and Simulation, 2013 Vol.5 No.4, pp.188 - 196

Published online: 30 Aug 2014 *

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