Hybrid vortex-in-cell finite-difference method for shear layer computation

Conference · Tue Jan 01 04:00:00 EST 1985 · AIAA Pap.; (United States)

OSTI ID:5603234

Mansour, N N

A hybrid numerical scheme is presented to compute turbulent shear flows. The equations of motion are assumed to be the vorticity and continuity equations and are to be solved in a given domain. The scheme divides the domain into two regions and uses a Lagrangian method in one region and an Eulerian method in the other. The two regions interact through the boundary separating them and the influence of the vorticity field in one region on the other region is accounted for by solving for the stream function in the entire domain. This scheme has been tested by simulating the interactions of two vortices in a square box. The solution obtained with this new method agrees with the solutions obtained using an Eulerian method, a vortex-in-cell method, and a grid-free vortex method. A two-dimensional mixing layer is simulated using this new method. Vortex formation and pairing are observed. The growth of the momentum thickness is found to be linear with the downstream distance. Self-similarity of the mean velocity and turbulence intensities profiles is observed. Comparison of these profiles with experimental data shows good agreement.

• Research Organization: Sandia National Labs., Livermore, CA
• OSTI ID: 5603234
• Report Number(s): CONF-850136-
• Conference Information: Journal Name: AIAA Pap.; (United States) Journal Volume: 85-0372
• Country of Publication: United States
• Language: English

Related Subjects

640410* -- Fluid Physics-- General Fluid Dynamics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOUNDARY LAYERS
CHEMICAL REACTIONS
COMBUSTION
DIFFERENTIAL EQUATIONS
EQUATIONS
EQUATIONS OF MOTION
FINITE DIFFERENCE METHOD
FLUID FLOW
FLUID MECHANICS
ITERATIVE METHODS
LAYERS
MECHANICS
MIXING
NUMERICAL SOLUTION
OXIDATION
PARTIAL DIFFERENTIAL EQUATIONS
THERMOCHEMICAL PROCESSES
TURBULENT FLOW
VORTICES