Application of non-linear k-e turbulence model in flow simulation over underwater axisymmetric hull at higher angle of attack

Authors

  • R Sakthivel Research Scholar, Dept. of Applied Mechanics, Fluid Mechanics Laboratory, IIT Madras, Chennai
  • S Vengadesan Associate Professor, Dept. of Applied Mechanics, Fluid Mechanics Laboratory, IIT Madras, Chennai
  • S K Bhattacharyya Professor, Dept. of Ocean Engineering, IIT Madras, Chennai

DOI:

https://doi.org/10.3329/jname.v8i2.6984

Keywords:

Computational Fluid Dynamics (CFD), Autonomous Underwater Vehicle (AUV), Reynolds averaged Navier-Stokes Equation (RANS), non-linear k-? turbulence model

Abstract

This paper addresses the Computational Fluid Dynamics Approach (CFD) to simulate the flow over underwater axisymmetric bodies at higher angle of attacks.  Three Dimensional (3D) flow simulation is carried out over MAYA Autonomous Underwater Vehicle (AUV) at a Reynolds number (Re) of 2.09×106. These 3D flows are complex due to cross flow interaction with hull which produces nonlinearity in the flow. Cross flow interaction between pressure side and suction side is studied in the presence of angle of attack. For the present study standard k-ε model, non-linear k-ε model models of turbulence are used for solving the Reynolds Averaged Navier-Stokes Equation (RANS). The non-linear k-ε turbulence model is validated against DARPA Suboff axisymmetric hull and its applicability for flow simulation over underwater axisymmetric hull is examined. The non-linear k-ε model performs well in 3D complex turbulent flows with flow separation and flow reattachment.  The effect of angle of attack over flow structure, force coefficients and wall related flow variables are discussed in detail. 

Keywords: Computational Fluid Dynamics (CFD); Autonomous Underwater Vehicle (AUV); Reynolds averaged Navier-Stokes Equation (RANS); non-linear k-ε turbulence model

doi: http://dx.doi.org/10.3329/jname.v8i2.6984  

Journal of Naval Architecture and Marine Engineering 8(2011) 149-163

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Published

22.11.2011

How to Cite

Sakthivel, R., Vengadesan, S., & Bhattacharyya, S. K. (2011). Application of non-linear k-e turbulence model in flow simulation over underwater axisymmetric hull at higher angle of attack. Journal of Naval Architecture and Marine Engineering, 8(2), 149–163. https://doi.org/10.3329/jname.v8i2.6984

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