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drag--fluid-dynamics
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Experimental and numerical hydrodynamic modeling of an underwater manipulator
, Article American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED ; Volume 256 , 2000 , Pages 291-296 ; 08888116 (ISSN) ; Tehranian, A ; Meghdari, A ; Sadeghipour, M. S ; Sharif University of Technology
2000
Abstract
This paper presents the kinematics and dynamic modeling of a three-link (3-DOF) underwater manipulator where the effects of hydrodynamic forces are investigated. In our investigation, drag and added mass coefficients are not considered as constants. In contrast, the drag coefficient is a variable with respect to all relative parameters. Experiments were conducted to validate the hydrodynamic model for a one degree-of-freedom manipulator up to a three degrees-of-freedom manipulator. Finally, the numerical and experimental results are compared and thoroughly discussed
Comparison final velocity for land yacht with a rigid wing and cloth sail
, Article International Journal of Engineering, Transactions A: Basics ; Volume 22, Issue 1 , February , 2009 , Pages 59-68 ; 17281431 (ISSN) ; Rad, M ; Sharif University of Technology
Materials and Energy Research Center
2009
Abstract
The powering requirement of a land yacht is one of the most important aspects of its design. In this respect the wind tunnel testing is an effective design tool. In fact, changing the parameters of the vehicle and testing the changes in the wind tunnel will give us a better understanding of the most efficient vehicle, and yet it is time consuming, expensive, and has inherent scaling errors. Another set of design tools are Computational Fluid Dynamics and parametric prediction. Computational Fluid Dynamics (CFD) codes are not yet wholly proven in its accuracy. Parametric prediction is the starting point for most engineering studies. It will be used to calculate the land yacht's performance...