Simulation of mass transfer at high Schmidt number in unsteady mixed convection flow

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:500853

Hoey, D; Tangborn, A ^[1]

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1. Northeastern Univ., Boston, MA (United States). Dept. of Mechanical Engineering

Numerical simulations of two-dimensional mass transfer in a mixed convection channel flow are carried out using a spectral technique. A streamwise varying heat flux is imposed at the lower surface while uniform temperature is imposed at the upper wall. The flow is treated as periodic in the streamwise direction. The spectral technique employed uses a Chebyshev expansion in the vertical (y) direction and Fourier expansions in the x direction. The flows being considered involve high Schmidt number and moderate Prandtl number, so that the concentration boundary layer is much thinner than the velocity or thermal boundary layers. The scheme introduced here uses a finer mesh for the concentration field than for temperature or velocity. The advection terms in the concentration equation require the velocity field on this finer mesh, so the velocity is interpolated on to the concentration mesh using Chebyshev/Fourier coefficients as interpolants. The scheme is demonstrated and tested for grid independence on mass transfer in unsteady two-dimensional mixed convection flow.

• OSTI ID: 500853
• Report Number(s): CONF-950828--; ISBN 0-7918-1710-5
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CALCULATION METHODS
COMPUTERIZED SIMULATION
FORCED CONVECTION
MASS TRANSFER
MESH GENERATION
NATURAL CONVECTION
NUMERICAL ANALYSIS
NUMERICAL SOLUTION
THEORETICAL DATA
TWO-DIMENSIONAL CALCULATIONS