نتایج جستجو برای: ε model
تعداد نتایج: 2115977 فیلتر نتایج به سال:
ساختار جریان در آبگیرها ساختاری سه بعدی و بسیار پیچیده است. بنابراین کاربرد معادلات یک بعدی و دو بعدی در این نوع جریان ها واقعیت جریان را به اندازه کافی بیان نمی کند. در این پژوهش شبیه سازی عددی جریان منشعب شده از یک کانال اصلی به داخل کانال فرعی با زاویه 45 درجه مورد بررسی قرار گرفت و نتایج به دست آمده با مدل آزمایشگاهی مقایسه شد. در این مطالعه از دو مدل محاسباتی rng k-ε ,standard k-ε برای مدل...
Abstract. We consider the system of equations that describes small nonstationary motions of viscous incompressible fluid with a large number of small rigid interacting particles. This system is a microscopic mathematical model of complex fluids such as colloidal suspensions, polymer solutions etc. We suppose that the system of particles depends on a small parameter ε in such a way that the size...
Using the idea of the penguin box expansion we find an analytic expression for ε/ε in the Standard Model as a function of mt, ms(mc) and two non-perturbative parameters B (1/2) 6 and B (3/2) 8 . This formula includes next-to-leading QCD/QED short distance effects calculated recently by means of the operator product expansion and renormalization group techniques. We also derive an analytic expre...
Different variants for buoyancy-affected terms in k-ε turbulence model have been utilized to predict the flow parameters more accurately, and investigate applicability of alternative k-ε turbulence buoyant closures in numerical simulation of a horizontal gravity current. The additional non-isotropic turbulent stress due to buoyancy has been considered in production term, based on Algebraic Stre...
Strong final state interaction (FSI) effects can play a central role in the Standard Model prediction of weak K → 2π matrix elements. Here, I discuss how FSI's affect the direct CP violation parameter ε ′ /ε by solving the Omnès problem for the necessary K → 2π amplitudes. The main results of this analysis have been reported in a previous paper 1 and are further discussed in Refs. 2,3. The resu...
This paper focuses on the developing a mechanistic model of the biopolymerization process and linking with the feedforward neural network model to obtain a hybrid model of lipase-catalyzed ring-opening polymerization of ε-caprolactone (ε-CL) for Poly (ε-caprolactone) PCL production using feed forward neural networks and control using model predictive control. Model predictive control (MPC) has ...
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