Development and preliminary testing of a constitutive model for turbulent flow along a streamwise corner

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5520461

Eppich, H M

An improved pressure-strain model, algebraic Reynolds stress model, and wall functions for k and {epsilon} are presented for turbulent flow along streamwise corners of arbitrary angle. These models were developed in order to obtain improved predictions for non-circular duct flows. A method of images technique is employed for modeling corner layer, near-wall pressure-strain effects. This approach provides theoretical justification for near-wall pressure-strain damping functions that are linear in the ratio of the dissipation length-scale to an effective-wall distance. Justification is given for relaxing one of the two continuity constraints normally applied to this type of pressure-strain model. This practice alleviates conflicts between coefficient definitions and relevant constraints without sacrificing the basic properties of the model. An updated set of primary and near-wall pressure-strain coefficient values is presented also. The algebraic Reynolds stress model is derived from a modeled form of the Reynolds stress transport equations which contain the proposed pressure-strain model and a model for convection and diffusion terms.

• Research Organization: Washington Univ., Seattle, WA (USA)
• OSTI ID: 5520461
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CONVECTION
DIFFUSION
DUCTS
ENERGY TRANSFER
FLOW MODELS
FLUID FLOW
HEAT TRANSFER
MASS TRANSFER
MATHEMATICAL MODELS
PRESSURE EFFECTS
REYNOLDS NUMBER
TURBULENT FLOW