PRESSURE AND VELOCITY AMPLITUDES OF THE INCOMPRESSIBLE FLUID IN CONCENTRIC ANNULAR PASSAGE WITH OSCILLATORY BOUNDARY: TURBULENT FLOW

• Main Authors: ABOLGHASEM MEKANIK, MOHAMAD ALI YAVARI
• Format: Article
• Language: English
• Published: Taylor's University 2014-04-01
• Series: Journal of Engineering Science and Technology
• Subjects: Annular flow; Unsteady pressure and velocity; Oscillatory boundary; FIV; FSI
• Online Access: http://jestec.taylors.edu.my/Vol%209%20Issue%202%20April%2014/Volume%20(9)%20Issue%20(2)%20220-232.pdf

An unsteady program based on a turbulence model called Baseline (BSL) komega model was conducted to simulate three turbulent flows with Re numbers of 4×103, 8×103 and 1×104, between two initially concentric cylinders. The effects of principal flow variables, i.e., mean axial velocity and fluid temperature, annular passage configurations, i.e., the gap width and radii of cylinders on the pressure and circumferential velocity of a three dimensional turbulent flow in the annular passage were investigated. The results were validated with the available solutions in the literature and fairly good agreements are seen. By increasing the gap of the annular passage and the axial flow velocity, smaller values for the unsteady pressure and the circumferential velocity amplitudes are produced. For each of the turbulent flows the unsteady pressure amplitude increases with the fluid temperature, as well as the circumferential velocity amplitude. The results of this investigation are favorably used for FIV and FSI calculations in such configurations.