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Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods
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Research on smoke simulation with vortex shedding.

Rui Tao1, Hongxiang Ren1, Delong Wang1

  • 1Navigation College, Dalian Maritime University, Dalian, China.

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This study introduces an improved Lagrangian vortex method for fluid simulations. It enhances velocity field computation and boundary condition handling for more efficient and detailed turbulent smoke simulations.

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Area of Science:

  • Computational fluid dynamics
  • Fluid mechanics
  • Numerical simulation

Background:

  • Lagrangian vortex methods offer detailed fluid simulations, particularly for turbulent flows like smoke.
  • Existing methods face challenges with inefficient velocity field construction and complex boundary condition handling.

Purpose of the Study:

  • To present a novel, pure Lagrangian vortex method addressing computational inefficiencies and boundary condition complexities.
  • To enhance the speed and accuracy of fluid simulations using vortex-based approaches.

Main Methods:

  • Implementation of a nested grid structure utilizing a tree-based algorithm to accelerate velocity field computation.
  • Development of a new boundary treatment method for the vorticity field, incorporating a least squares approach for vortex element strength calculation.
  • Consideration of mutual interactions among generated vortex particles.

Main Results:

  • The nested grid algorithm significantly improves the efficiency of velocity computation.
  • The novel boundary treatment method effectively handles vorticity field complexities.
  • Visual results are comparable to original flow simulations, demonstrating method efficacy.

Conclusions:

  • The enhanced Lagrangian vortex method provides a more efficient and robust approach for simulating turbulent fluids.
  • The integration of nested grids and advanced boundary treatments overcomes key limitations of traditional vortex methods.
  • The method shows promise for applications requiring detailed and accurate fluid dynamics simulations.