Numerical Study of Turbulent Natural Convection in a Side-heated Two-dimensional Square Cavity at Various Angles of Inclination PDF Download

Author: Wei Liu
Publisher:
ISBN:
Category :
Languages : en
Pages : 92

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Author: Warit Chanprasert
Publisher:
ISBN:
Category : Computational fluid dynamics
Languages : en
Pages : 222

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Book Description
Natural convection in a side or differentially heated cavity is a classical problem in heat transfer. The problem represents a wide range of engineering applications and has also been commonly used as a benchmark problem for validating Computational Fluid Dynamics (CFD) computer programs. This study investigates turbulent natural convection of a fluid with a Prandtl number of 0.71 in a differentially heated square cavity with adiabatic top and bottom walls. Two different boundary conditions are applied to the side walls; (1) the standard isothermal side wall problem, and (2) the mixed isoflux/isothermal problem, which has a constant heat flux on the heated side wall with an isothermal cold wall on the opposite side. An experimental study is carried out to determine the net convective heat transfer between isothermal hot and cold walls for a range of wall temperature differences in the laminar flow regime. The experiment data is compared with CFD predictions, and they are found to be in reasonable agreement......

Author: Sheikh Anwar Hossain
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659186066
Category :
Languages : en
Pages : 88

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Finite Element Simulation of two-dimensional laminar steady state natural convection in a rectangular open cavity has been studied. A heated circular cylinder is placed at the centre of the cavity where the left sidewall to the cavity is heated by a constant heat flux. The top wall is kept cool and the bottom wall is kept at a hot temperature. The fluid is concerned with different Prandtl numbers. The properties of the fluid are assumed to be constant. The physical problems are represented mathematically by different sets of governing equations along with the corresponding boundary conditions. In this study, finite element method for steady state incompressible natural convection flows is used to find the numerical results. The Galerkin Weighted Residual method of finite element formulation is applied to discretize the non-dimensional governing equations. The results of the investigation are obtained in terms of streamlines, isotherms and heat transfer characteristics Nusselt numbers for different Grashof numbers and different inclination angles of the cavity ranges from 0o to 45o.

Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 400

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Author: Graham De Vahl Davis
Publisher:
ISBN: 9780909287375
Category : Fluid dynamics
Languages : en
Pages : 21

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Author: K. H. Winters
Publisher:
ISBN:
Category : Insulation (Heat)
Languages : en
Pages :

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Author: Wei Cha
Publisher:
ISBN:
Category : Electronic apparatus and appliances
Languages : en
Pages : 196

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Author: N. A. Grosek
Publisher:
ISBN:
Category :
Languages : en
Pages : 54

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An experimental study of natural convective heat transfer in a two-dimensional enclosed cavity was conducted with various cavity geometries. The square cavity was divided by a vertical or diagonal partition. Convective heat transfer rates were determined from interferograms. Heat transfer was reduced by partitioning, but by less than 50%. Effects of left and right diagonal partitions were temperature dependent. This was attributed to the presence of complex radiation effects. (Author).

Author: D.A. Nield
Publisher: Springer Science & Business Media
ISBN: 9780387290966
Category : Science
Languages : en
Pages : 672

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Book Description
Nonprofit organizations are suffering from the continuing economic downturn. Donations are decreasing while demand for services is growing, forcing these organizations to be increasingly efficient and effective with their funds. This book introduces the reader to the basic concepts of project management. It provides approaches and templates to help nonprofit managers quickly implement practices to help them manage their limited resources, both financial and volunteer. The book also provides a tool to help the project team determine which practices are most appropriate. The book explores how social media and other technology tools can be used to assist in the management of time-sensitive projects and shows how project portfolio management can be a tool to assist in communications with boards of directors and other governing entities. The project portfolio is a tool that development office managers can easily implement and adopt to facilitate resource assignment. Finally, the book offers three case studies of nonprofit projects that went awry and shows how project management would have assisted.

Author: Thomas K. Toltzien
Publisher:
ISBN:
Category :
Languages : en
Pages : 96

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Book Description
A numerical investigation was conducted on two-dimensional natural convection within inclined rectangular enclosures partitioned into 45 degree triangular cells. The time dependent governing equations, vorticity, energy, and stream function, were solved by an ADI method and a Gauss-Seidel SOR technique. The numerical procedure was validated for rectangular enclosures, then modified for triangular cells. Heat transfer coefficients were determined for an inclined square enclosure with a diagonal partition for Grashof numbers less than 200,000 and inclination angles between 10 degrees and 90 degrees. These results show a diagonal partition reduces the heat transferred by natural convection across an inclined square enclosure by more than 50%. (Author).