Numerical Simulation of Incompressible Turbulent Flow using Linear Eddy Viscosity-based Turbulence Models

Sekhar Majumdar; B.N. Rajani; D.S. Kulkarni; M.B. Subrahmanya

doi:10.14429/dsj.60.603

Sekhar Majumdar Nitte Meenakshi Institute of Technology, Bangalore
B.N. Rajani National Aerospace Laboratories, Bangalore
D.S. Kulkarni National Aerospace Laboratories, Bangalore
M.B. Subrahmanya National Aerospace Laboratories, Bangalore

DOI: https://doi.org/10.14429/dsj.60.603

Keywords: Multi-block boundary-conforming grid, moving boundary, pressure-velocity solution strategy, eddy viscosity-based turbulence models, unsteady flow

Abstract

The present study focuses on the recent development of an implicit pressure-based finite volume algorithm for numerical solution of Reynolds averaged Navier-Stokes equations (RANS) in an inertial frame of reference for the prediction of unsteady incompressible flow problems. The algorithm uses boundary-conforming, multiblock structured grid with moving boundaries, collocated variable arrangement with momentum equations resolved along cartesian directions, second-order accurate spatial and temporal discretisation schemes for the convective fluxes and a pressure-velocity solution strategy. Effect of turbulence was simulated using appropriate linear eddy viscosity-based turbulence models. The capabilities and limitations of the cost-effective unsteady Reynolds averaged Navier-Stokes (URANS) approach has been demonstrated for few application problems of engineering interest.

Defence Science Journal, 2010, 60(6), pp.614-627, DOI:http://dx.doi.org/10.14429/dsj.60.603

Author Biographies

Sekhar Majumdar, Nitte Meenakshi Institute of Technology, Bangalore

Dr Sekhar Majumdar received his PhD in Mechanical Engineering in 1981. He was a Senior Scientist at the National Aerospace Laboratories, Bengaluru from 1989 till January 2008 and was the Head of the Computational and Theoretical Fluid Dynamics Division (CTFD) at NAL, Bengaluru. Currently, he is Professor with the Mechanical Engg. Department, NMIT Bengaluru. He worked as a Senior Research Scientist at the Institute for Hydromechanics, University Karlsruhe, Germany and a Senior Visiting Fellow at the Centre for Turbulence Research (2001-2002), Stanford University, California, USA. His research work on CFD for unsteady incompressible flows, turbulence modeling and large eddy simulations. He published about 75 research papers in national/international journals and conference proceedings. He is a Fellow of the Indian National Academy of Engineers and a Fellow of the Aeronautical Society of India. He is a Member, International Committee of Asian Fluid Mechanics Congress, Member Hydrodynamics Panel of NRB and Life Member of the National Society of Fluid Mechanics and Fluid Power, India.

B.N. Rajani, National Aerospace Laboratories, Bangalore

Ms B.N. Rajani obtained her MSc in Mathematics from University of Hyderabad and is currently pursuing her PhD from NITK, Surathkal (India). She is presently working as a scientist in CTFD Division, NAL, Bengaluru. Her current areas of research include CFD analysis for lowspeed flows, turbulence and transition modelling and large eddy simulation. She has published about 30 research papers in journals and conferences. She has received the NAL Outstanding Performance award in 2002.

D.S. Kulkarni, National Aerospace Laboratories, Bangalore

Mr Dattatraya S. Kulkarni obtained his BE (Mechanical Engineering), MTech (Fluid Mechanics and Thermal Sciences) from PDA College of Engg., Gulbarga and IIT, Kanpur, respectively. Presently, he is working as a scientist in the CTFD division of NAL, Bengaluru. His research areas include CFD analysis of low-speed flows and turbulence and transition modelling. He has more than 17 papers to his credit. He received IEI Young Engineer Award (2008) in Aerospace Engineering.

M.B. Subrahmanya, National Aerospace Laboratories, Bangalore

Mr M.B. Subrahmanya obtained his BE (Automobile Engineering) and MTech (Thermal Engineering) from Malnad College of Engineering and NITK, Surathkal, respectively. Presently he is working as a scientist in the CTFD Division at NAL, Bengaluru. His research areas include CFD analysis of low-speed flows and turbulence modelling. He has more than 8 papers to his credit.