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Uplift Pressure of Waves on A horizontal plate

海洋工程：英文版 2003年第3期17卷 355-368页

作者：周益人陈国平黄海龙王登婷 College of Transportation and Ocean Engineering Harbor and River Department

Uplift pressures of waves acting on horizontal plates are the important basis for design of maritime hollow-trussed structures. In this paper, an experimental study on the uplift pressures of waves on a horizontal plate is conducted by use of a series of model tests. Detailed analysis has been given to the formation mechanism of uplift pressures of waves. It is considered that the impact pressure intensity is mainly affected by geometrical factors (tangential angle of waves), dynamic factors (wave height, wave velocity, etc.) and air cushion. Based on the test results, an equation for calculation of the maximum uplift pressure intensity of waves on a plate is presented. A large quantity of test data shows good agreement of the present equation with the test results.

关键词： horizontal plate waves uplift pressures

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Applied Mathematics 2016年第3期7卷 313-319页

作者： Rama Charan Chaudhary Gopal Naraian Purohit Preeti Garg Department of Mathematics University of Rajasthan Jaipur India Department of Mathematics Banasthali Vidyapith Banasthali India Department of Mathematics Kirori Mal College University of Delhi New Delhi India

This paper considers the problem of hydrodynamics and thermal boundary layers of Darcy flow over horizontal surface embedded in a porous medium. The solutions of such problems for the cases of uniform surface temperature and variable surface temperature have been studied and analysed in many papers. This paper, however, attempts to find similarity solutions for the Darcy flow problem with a convective boundary condition at the plate surface. It is found that the solution is possible when the heat transfer coefficient is proportional to x–2/3. The numerical solutions thus obtained are analyzed for a range of values of the parameter characterizing the hot fluid convection process. Analytical expressions are provided for local surface heat flux and total surface heat transfer rate while the flow variables are discussed graphically.

关键词： Similarity Solution horizontal plate Heat Transfer Rate Darcy Flow Convective Boundary Condition

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Open Journal of Fluid Dynamics 2016年第4期6卷 279-302页

作者： Mohammed Nasir Uddin Md. Yeakub Ali N. M. Ridwan Zahed Md. Jashim Uddin Department of Mathematics Chittagong University of Engineering & Technology Chittagong Bangladesh Department of Electrical & Electronic Engineering International Islamic University Chittagong Chittagong Bangladesh

Unsteady mixed convective boundary layer flow of viscous incompressible fluid along isothermal horizontal plate is analyzed through Similarity Solutions. The governing partial differential equations are transformed into ordinary differential equations using the similarity transformation and solved numerically along with shooting technique. The flow field for the fluid velocity, temperature and concentration at the plate surface are significantly influenced by the governing parameters such as unsteadiness parameter, permeability parameter, Prandtl number, Schmidt number and the other driving parameters. The results show that both fluid velocity and temperature decrease but no significant effect on concentration for the increasing values of Prandtl number. It is also exposed that velocity and concentration is higher at lower Schmidt number for low Prandtl fluid. Finally, the dependency of the Skin-friction co-efficient, Nusselt number and Sherwood number, which are of physical interest, are also illustrated in tabular form for the governing parameters.

关键词： Similarity Solution Unsteady Flow Mixed Convection Boundary Layer Flow horizontal plate Incompressible Fluid

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A NEW NUMERICAL WAVE FLUME COMBINING THE 0-1 TYPE BEM AND THE VOF METHOD

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Journal of Hydrodynamics 2012年第4期24卷 506-517页

作者： GUO Li-dong SUN Da-peng WU Hao State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

A new coupling numerical wave model, based on both the Boundary Element Method （BEM） and the Volume Of Fluid （VOF） method, is established by taking advantages of the both methods to solve the wave-structure interaction problems. In this model, the wave transformation in front of structures is calculated by the 0-1 type BEM, and the intense wave motions near the structures are calculated by the VOF method. In this paper, the characteristics of the BEM and the VOF method are discussed first, and then the coupling treatments are described in detail. In the end, the accuracy and the validity of the coupling model are examined by comparing the numerical results with experiment results and other numerical results available for the interactions between regular waves with a monolayer horizontal plate.

关键词： Boundary Element Method (BEM) Volume Of Fuid (VOF) method coupling numerical wave model horizontal plate

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