Before-and-after studies of the effects of a powerplant installation on Lake LBJ: a numerical study of the velocity and temperature fields in a stratified reservoir with artificial thermal inputs. Interim report No. 4 to the Lower Colorado River Authority, Austin, Texas

Technical Report · Wed May 01 04:00:00 EDT 1974

OSTI ID:6187668

Crow, L I; Oberkampf, W L

The present study is concerned with the numerical simulation of the velocity and temperature fields in an idealized reservoir under various natural and artificial conditions. Two-dimensional viscous flow in a vertical plane with rectangular cross section is analyzed. The fluid dynamic equations of motion are solved in finite difference form by the Alternating Direction Implicit method. The numerical model allows surface inflow to the reservoir at any temperature and outflow at any depth on the opposite end of the reservoir. At the surface of the reservoir the wind shear, short wave and long wave radiation to the water, back radiation from the water, evaporation, and convective heat transfer are taken into account. The effects of wind shear and inflow/outflow without temperature effects are first treated independently. These driving phenomena are then combined with heat transfer effects and heated inflow so as to treat the complete problem.

• Research Organization: Texas Univ., Austin (USA). Center for Research in Water Resources
• OSTI ID: 6187668
• Report Number(s): CRWR-108; ON: DE83901430
• Country of Publication: United States
• Language: English

Related Subjects

520400* -- Environment
Aquatic-- Thermal Effluents Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
DIFFERENTIAL EQUATIONS
ENERGY TRANSFER
EQUATIONS
EQUATIONS OF MOTION
FINITE DIFFERENCE METHOD
FLUID FLOW
HEAT TRANSFER
ITERATIVE METHODS
MATHEMATICAL MODELS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
SURFACE WATERS
TEMPERATURE EFFECTS
TEMPERATURE GRADIENTS
THERMAL EFFLUENTS
TWO-DIMENSIONAL CALCULATIONS
WATER RESERVOIRS