• DOI:10.1063/1.4996179
• Corpus ID: 119335514

Three-dimensional flow in cavity with elevated helicity driven by parallel walls

@article{Povitsky2017ThreedimensionalFI,
  title={Three-dimensional flow in cavity with elevated helicity driven by parallel walls},
  author={Alex Povitsky},
  journal={arXiv: Fluid Dynamics},
  year={2017}
}

• A. Povitsky
• Published 2 April 2017
• Physics
• arXiv: Fluid Dynamics

The proposed flow in a 3-D cubic cavity is driven by its top and bottom walls moving in perpendicular directions. This flow is a representative of genuinely three-dimensional highly separated vortical flows with elevated helicity yet having simple single-block cubical geometry of computational domain. The elevated level of helicity in the proposed flowfield is caused by motion of a wall in the direction of axis of primary vortex created by a parallel wall. The flowfield is obtained numerically by using second-order upwind scheme and 2003 grid. Helicity, momentum and patterns of vortices are evaluated for the range of Reynolds numbers from 100 to 1000. Formation of two primary vortices with their axis oriented perpendicularly and patterns of secondary vortices are discussed. Computational results are compared to the well-known 3-D recirculating cavity flow case where the lid moves in the direction parallel to the cavity side walls. Also results are compared to the diagonally top-driven cavity and to cavity flow driven by moving top and side walls. The streamlines for the proposed flow show formation of two primary vortices with perpendicular axis so as the particles emerging from top and bottom of cavity do mix well.