OPTIMAL CHARACTER AND DIFFERENT NATURE OF FLOWS IN LAMINAR BOUNDARY LAYERS OF INCOMPRESSIBLE FLUID FLOW
نویسندگان
چکیده
The paper presents an original approach to the study of problem internal friction arising from motion a rigid body in incompressible fluid. This takes into account spatial variability molecular viscosity boundary layer region, and solution is based on use extreme for fluid flow rate functional. layer, by well-known analogy with theory heat conduction, absence isotropy medium. It shown that depends nature - how many forces act So, if unsteady non-gradient or steady gradient, then both these flows are subject action two forces. In such flows, due constant value. has been fond distribution velocity gradient stationary parabolic law, all existing theories described this law quite accurately, error maximum 5%. At same time, laminar only force acts causes viscosity: shear stress can be not linearity distribution, which observed but also viscosity. resulting exponential complete agreement those problems solved Stokes, confirmed experimentally. points out consistent modern data obtained direct numerical simulation (DNS) Low Reynolds numbers – single-phase two-phase, presence particles inside
منابع مشابه
Boundary layers interactions in the plane parallel incompressible flows
We study the inviscid limit problem of the incompressible flows in the presence of both impermeable regular boundaries and a hypersurface transversal to the boundary across which the inviscid flow has a discontinuity jump. In the former case, boundary layers have been introduced by Prandtl as correctors near the boundary between the inviscid and viscous flows. In the latter case, the viscosity ...
متن کاملA Boundary Method for Incompressible Fluid Flow
The animation of fluids is a topic of great interest in the computer animation community. The common familiarity with real-world fluid motion and the difficulty in achieving this motion combines to make the problem exceptionally challenging — everyone knows what fluid should look like, but animating it convincingly by hand is difficult. To achieve realistic fluid motion, researchers have been g...
متن کاملThe Solution of Laminar Incompressible Flow Equation with Free Surfaces in Curvilinear Coordinates
In this paper a novel numerical approach is presented for solving the transient incompressible fluid flow problems with free surfaces in generalized two-dimensional curvilinear coordinate systems. Solution algorithm is a combination of implicit real-time steps and explicit pseudo-time steps. Governing fluid flow equations are discretized using a collocated finite-volume mesh. Convective terms a...
متن کاملThe Solution of Laminar Incompressible Flow Equation with Free Surfaces in Curvilinear Coordinates
In this paper a novel numerical approach is presented for solving the transient incompressible fluid flow problems with free surfaces in generalized two-dimensional curvilinear coordinate systems. Solution algorithm is a combination of implicit real-time steps and explicit pseudo-time steps. Governing fluid flow equations are discretized using a collocated finite-volume mesh. Convective terms a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: ???????? ?????? ? ???????????
سال: 2022
ISSN: ['0370-2197']
DOI: https://doi.org/10.18372/0370-2197.4(97).16959