Modulation of large-scale motions due to blowing and suction

ORAL

Abstract

Our previous studies revealed that large-scale energy containing structures in turbulent channel flows can be modulated by using blowing perturbations to yield improved heat and mass transfer. In the present study, we investigate the impact of suction perturbations on large-scale motions in a turbulent channel flow at a moderate Reynolds number. The flow is decomposed into its constituent scales by using proper orthogonal decomposition. Anisotropic factor for each mode is computed and used to separate the flow into two groups: large-scale motions and small-scale motions. The effects of both blowing and suction on Reynolds stresses and turbulent heat fluxes are demonstrated.

*NSF(CBET)-ONR 1512393

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Presenters

  • Suranga Dharmarathne

    • University of Indianapolis, University of Indianapolis

Authors

  • Suranga Dharmarathne

    • University of Indianapolis, University of Indianapolis

  • Venkatesh Pulletikurthi

    • Purdue University
    • School of Mechanical Engineering, Purdue University, West Lafayette, IN 47906, USA

  • Murat Tutkun

    • University of Oslo
    • Institute for Energy Technology, IFE, University of Oslo

  • Luciano Castillo

    • Purdue University