Date of Award
Master of Science (MS)
The thesis consists of two parts. The first part focuses on numerical simulations and their comparison with experimental data for single-jet impingement on ground. Angles between the axisymmetric jet and impingement surface considered are 15, 30 and 90 degree. It is shown that both the k-epsilon and Wray-Agarwal (WA) model can predict the flow fields in good agreement with the experimental results. The second part extends the first part to twin-jet normal impingement on the ground. It focuses on numerical simulation of fountains formed by the twin-jet impingement. The fountains can be normal straight upward when the two jets are identical and can become inclined or even curved when the two jets are of different velocities and/or diameters. Since the jets exits are close to the impingement surface, some important flow phenomenon of fountains are studied for various inlet jet Reynolds numbers, impingement heights above the ground and distance between the twin jets. The incompressible Reynolds-Averaged Navier-Stokes (RANS) equation with k-epsilon and WA turbulence model are solved using the commercial CFD solver Ansys Fluent for computation of the flow fields.
David Peters Swami Karunamoorthy