King Fahd University of Petroleum and Minerals (Saudi Arabia)
تاریخ نشرو بخش و غیره
1996
مشخصات ظاهری
نام خاص و کميت اثر
196
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
Ph.D.
کسي که مدرک را اعطا کرده
King Fahd University of Petroleum and Minerals (Saudi Arabia)
امتياز متن
1996
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
The problem of incompressible axisymmetric flow over spheroidal bodies is considered. The analysis covers steady and unsteady flows of inviscid and viscous fluids. The spheroidal bodies may take the shape of spheres, oblate or prolate spheroids. The study is based on analytical and numerical solutions of the mass and momentum conservation equations. Euler's equations are solved analytically for the case of inviscid flow while the full Navier-Stokes equations are solved numerically for the case of viscous flow. The study focuses on the time variation of the velocity field as well as the hydrodynamic forces due to free-stream oscillations. The method of solution of the full Navier-Stokes equations combines analytical and numerical techniques where the stream function and vorticity are approximated using Legendre functions whereas the resulting differential equations are solved numerically. The parameters involved in the viscous flow problem are the Reynolds number, Strouhal number, and the spheroidal body geometry. The study covers Reynolds numbers in the range from 0.1 to 200 and Strouhal numbers in the range from usd\pi /4usd to usd2\pi .usd Results are presented in terms of the drag coefficient, surface vorticity and surface pressure distributions, and streamline and equi-vorticity patterns. Detailed analysis of the velocity field including the wake length and angle of separation is also presented.
موضوع (اسم عام یاعبارت اسمی عام)
موضوع مستند نشده
Applied sciences
موضوع مستند نشده
axisymmetric
موضوع مستند نشده
Civil engineering
موضوع مستند نشده
computational fluid dynamics
موضوع مستند نشده
Mechanical engineering
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )