Direct simulation of turbulent flow in a square duct: Reynolds‐stress budgets

1994 ◽  
Vol 6 (9) ◽  
pp. 3144-3152 ◽  
Author(s):  
Asmund Huser ◽  
Sedat Biringen ◽  
Ferhat F. Hatay
Keyword(s):  
Turbulent Flow ◽  
Reynolds Stress ◽  
Direct Simulation ◽  
Square Duct ◽  
Stress Budgets

A Priori Analysis of Explicit Algebraic Stress Models for a Turbulent Flow Through a Straight Square Duct

2004 ◽  
Author(s):  
H. Naji ◽  
O. El Yahyaoui ◽  
G. Mompean
Keyword(s):  
Turbulent Flow ◽  
Reynolds Stress ◽  
Stokes Equations ◽  
A Priori ◽  
Proximity Effects ◽  
Navier Stokes ◽  
Wall Region ◽  
Square Duct ◽  
Anisotropy Tensor ◽  
Stress Models

The ability of two explicit algebraic Reynolds stress models (EARSMs) to accurately predict the problem of fully turbulent flow in a straight square duct is studied. The first model is devised by Gatski and Rumsey (2001) and the second is the one derived by Wallin and Johansson (2000). These models are studied using a priori procedure based on data resulting from direct numerical simulation (DNS) of the Navier-Stokes equations, which is available for this problem. For this case, we show that the equilibrium assumption for the anisotropy tensor is found to be correct. The analysis leans on the maps of the second and third invariants of the Reynolds stress tensor. In order to handle wall-proximity effects in the near-wall region, damping functions are implemented in the two models. The predictions and DNS obtained for a Reynolds number of 4800 both agree well and show that these models are able to predict such flows.

A Calculation Method for Developing Turbulent Flow in Rectangular Ducts of Arbitrary Aspect Ratio

1995 ◽  
Vol 117 (2) ◽  
pp. 249-258 ◽  
Author(s):  
M. Naimi ◽  
F. B. Gessner
Keyword(s):  
Reynolds Number ◽  
Turbulent Flow ◽  
Transport Equation ◽  
Reynolds Stress ◽  
Equation Model ◽  
Strain Component ◽  
Square Duct ◽  
Damping Function ◽  
Strain Behavior ◽  
Proposed Model

This paper describes a full Reynolds stress transport equation model for predicting developing turbulent flow in rectangular ducts. The pressure-strain component of the model is based on a modified form of the Launder, Reece and Rodi pressure-strain model and the use of a linear wall damping function. Predictions based on this model are compared with predictions referred to high Reynolds number and low Reynolds number k–ε transport equation models and with experimental data taken in square and rectangular ducts. The results indicate that the proposed model yields improved predictions of primary flow development and Reynolds stress behavior in a square duct. The proposed model also yields Reynolds stress anisotropy and secondary flow levels that are compatible and agree well with experiment, without recourse to a quadratic damping function to model near-wall pressure-strain behavior.

scholarly journals Fully developed turbulent flow in a square duct with a rough wall.

1987 ◽  
Vol 53 (492) ◽  
pp. 2370-2376 ◽  
Author(s):  
Hideomi FUJITA ◽  
Hajime YOKOSAWA ◽  
Masafumi HIROTA ◽  
Satoru NISHIGAKI
Keyword(s):  
Turbulent Flow ◽  
Rough Wall ◽  
Square Duct ◽  
Fully Developed Turbulent Flow

Investigation of turbulent flow in square duct with heated foil thermometry

2021 ◽  
Vol 175 ◽  
pp. 121381
Author(s):  
Iztok Tiselj ◽  
Mohit Pramod Sharma ◽  
Boštjan Zajec ◽  
Nikola Veljanovski ◽  
Jan Kren ◽  
...  
Keyword(s):  
Turbulent Flow ◽  
Square Duct
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