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۱۹۸۴پ
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کتابنامه ص.:۷۳-۷۹
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۱۳۸۴/۱۱/۲۵
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در دینامیک سیالات محاسباتی برای بوجود آوردن الگوریتم هایی که در گستره وسیعی از اعداد رینولدز و ماخ بکار رود تلاش های زیادی انجام شده است .به طور کلی الگوریتم های حل جریان در روش حجم محدود معمول به دو دسته اصلی، الگوریتم های چگالی مبنا و فشار مبنا تقسیم می شود .الگوریتم های فشار مبنا از فشار به عنوان متغیر کاری استفاده می کنند .تغییرات فشار، بر خلاف تغییرات چگالی که در اعداد ماخ کوچک بسیار ناچیز است، در تمام ماخ ها قابل ملاحظه‌می باشد .به این دلیل روش های فشار مبنا را می توان در تمام ماخ ها استفاده کرد
Text of Note
tube problem. The results of the ENO scheme are compared with other computations published in literatures, and are in good agreement.-channel geometry as well as to the transient shock-in-Oscillating (ENO) has been developed into an implicit finite volume procedure. To achieve higher accuracies in convection fluxes, the higher order interpolations are used. Higher interpolations without boundedness criteria are producing oscillations in discontinuities, but the ENO scheme has the boundedness criteria. The other advantage of ENO method compare to the boundedness NVD and TVD methods which the accuracy is decreased by first order for interpolation in discontinuities is its higher accuracy in all domains. Then, the developed scheme is applied to the computation of steady subsonic and supersonic flows over a bump-based method. A scheme base on Essentially Non-state and transient flows in pressure-oscillating (ENO) scheme is extended to the computation of steady-based method has been solved. The characteristic Variables, together with use of a Riemann solver, which is proposed in this thesis, are used. The Essentially Non-capturing properties. But this approach used up to now has also problems. The main problem of this procedure in PISO, Simple, etc. algorithms is their elliptic equation for pressure. This property is caused the propagation of results in higher Mach Numbers which the flows have the hyperbolic property In this thesis, this problem as the main disadvantage of the pressure-correction formulation to ensure shock- In computational fluid dynamics (CFD), great research efforts have been devoted to the development of accurate and efficient numerical algorithms suitable for solving flow in the various Reynolds and Mach number regimes. There are indeed two pressure and density based algorithms. In pressure based algorithm, pressure is used as a working variable. Unlike density variations in lower Mach numbers, which are very low, Pressure variations are remarkable. Thus, this method can be used in all desired Mach numbers.The main purpose of this thesis is the development of methods for computation of flows at all Mach numbers by extending the pressure
PERSONAL NAME - PRIMARY RESPONSIBILITY
انجیل الی،ولی
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جوارشکیان،محمد حسن، استاد راهنما
عارف منش،علی، استاد مشاور
ELECTRONIC LOCATION AND ACCESS
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