![An Experimental and Numerical Investigation of Turbulent Flows in a Square Duct with 90 [degree] Bend PDF](https://books.google.com/books/content/images/frontcover/JCkpyAEACAAJ?fife=w150-h200)
Author: Faustin Alloise OndorePublisher:
ISBN:
Category :
Languages : en
Pages : 404
Book Description
An Experimental and Numerical Investigation of Turbulent Flows in a Square Duct with 90 [degree] Bend
![An Experimental and Numerical Investigation of Turbulent Flows in a Square Duct with 90 [degree] Bend PDF](https://books.google.com/books/content/images/frontcover/JCkpyAEACAAJ?fife=w80-h100)
Author: Faustin Alloise OndorePublisher:
ISBN:
Category :
Languages : en
Pages : 404
Book Description
An Experimental and Numerical Investigation of Turbulent Flows in a Square Duct with 90deg Bend
Author: Faustin Alloise OndoreExperimental and Numerical Investigation of Steady, Supersonic, Turbulent Flow Through a Square Duct
Author: David O. DavisPublisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 404
Book Description
Turbulent Convecting Flow in a Square Duct with a 180° Bend ; an Experimental and Numerical Study
Author: Richard W. JohnsonTurbulent Convecting Flow in a Square Duct with a 180 Degree Bend; an Experimental and Numerical Study
Author: Richard W. JohnsonTurbulent Convecting Flow in a Square Duct with a 180deg Bend
Author: R. W. JohnsonPublisher:
ISBN:
Category :
Languages : en
Pages : 537
Book Description
The research in this British dissertation was motivated by the desire to provide a comprehensive set of convective heat transfer data against which flow simulation schemes could be tested. Turbulent convecting three-dimensional flow of fluids in curved passages is frequently encountered in thermofluids equipment and systems. Although such flow situations have been too complex to adequately simulate computationally in the past, recent developments have provided physical models coupled with numerical techniques which can be applied to provide such simulations. Nevertheless, it has not been established to what extent such simulations provide accurate predictions and a sufficiently detailed data base does not exist to allow a searching evaluation of computer predictions. It is the conclusion of this collaborative study that significant inadequacies remain in the turbulence and wall models with respect to their ability to predict fully-three dimensional curved turbulent flow. Predictions for the Nusselt number distribution are in rather better agreement with the experimental data than are the hydrodynamic and temperature field predictions.
Experimental and Numerical Investigation of Heat and Fluid Flow in a Square Duct Featuring Criss-cross Rib Patterns
Author: Characterisation of Turbulent Duct Flows
Author: Bayode OwolabiPublisher: Springer
ISBN: 303019745X
Category : Science
Languages : en
Pages : 141
Book Description
This book presents several new findings in the field of turbulent duct flows, which are important for a range of industrial applications. It presents both high-quality experiments and cutting-edge numerical simulations, providing a level of insight and rigour rarely found in PhD theses. The scientific advancements concern the effect of the Earth’s rotation on large duct flows, the experimental confirmation of marginal turbulence in a pressure-driven square duct flow (previously only predicted in simulations), the identification of similar marginal turbulence in wall-driven flows using simulations (for the first time by any means) and, on a separate but related topic, a comprehensive experimental study on the phenomenon of drag reduction via polymer additives in turbulent duct flows. In turn, the work on drag reduction resulted in a correlation that provides a quantitative prediction of drag reduction based on a single, measurable material property of the polymer solution, regardless of the flow geometry or concentration. The first correlation of its kind, it represents an important advancement from both a scientific and practical perspective.
Experimental and Numerical Investigation of Flow and Heat Transfer in a Ribbed Square Duct
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 43
Book Description
The present contribution describes the methodology and results of an experimental/numerical research program progressing at the von Karman Institute about the investigation of flow and heat transfer in a square section stationary duct equipped with high blockage ribs on one face. This geometry is representative of a high pressure turbine blade cooling channel. The purpose is to highlight the interaction and the synergy between experimental and simulation approaches. The paper shows how the experimental results lead to a conceptual model of the behavior and the topology of this flow. A numerical prediction of the flow over a single rib, obtained from a Large-Eddy Simulation, is able to validate this model, to provide additional information eventually not accessible by the experiments and to put in evidence the underlying structures driving the process. Simulations of a multi-rib domain put in evidence the possible existence of flow structures longer than one rib-pitch length and suggest possible avenues of futures experimental/numerical campaigns to gain a full understanding of this class of flows.
Computation of Laminar and Turbulent Flow in Curved Ducts, Channels, and Pipes Using the Navier-Stokes Equations
Author: R. C. BuggelnPublisher:
ISBN:
Category : Laminar flow
Languages : en
Pages : 84
Book Description
Both laminar and turbulent flows in strongly curved ducts, channels, and pipes are studied by numerical methods. The study concentrates on the curved square-duct geometry and flow conditions for which detailed measurements have been obtained recently by Taylor, Whitelaw, and Yianneskis. The solution methodology encompasses solution of the compressible ensemble-averaged Navier-Stokes equations at low Mach number using a split linearized block implicit (LBI) scheme, and rapid convergence on the order of 80 noniterative time steps is obtained. The treatment of turbulent flows includes resolution of the viscous sublayer region. A series of solutions for both laminar and turbulent flow and for both two- and three-dimensional geometries of the same curvature are presented. The accuracy of these solutions is explored by mesh refinement and by comparison with experiment. In summary, good qualitative and reasonable quantitative agreement between solution and experiment is obtained. Collectively, this sequence of results serves to clarify the physical structure of these flows and hence how grid selection procedures might be adjusted to improve the numerical accuracy and experimental agreement. For a three-dimensional flow of considerable complexity, the relatively good agreement with experiment obtained for the turbulent flow case despite a coarse grid must be regarded as encouraging. (Author).