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Linear stability analysis of turbulent flows

Vikrant Gupta (Energy)


Linear stability analysis for laminar flows has proved to be useful in predicting the flow instability for a large number of cases. However, in case of turbulent flows it does not have much success and only a limited number of flows can be dealt with present methods. This is partly true because almost all the work in linear stability uses eddy viscosity model (EVM) to obtain linearized perturbation equations. In such case, it might be helpful if we apply Reynolds stress model (RSM) for stability analysis. We present the application of explicit-algebraic-RSM for fully developed turbulent channel flow.