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3 edition of **Numerical simulation of unsteady incompressible viscous flows in generalized coordinate systems** found in the catalog.

Numerical simulation of unsteady incompressible viscous flows in generalized coordinate systems

- 93 Want to read
- 39 Currently reading

Published
**1988** by National Aeronautics and Space Administration, Ames Research Center, For sale by the National Technical Information Service in Moffett Field, Calif, [Springfield, Va .

Written in English

- Unsteady flow (Aerodynamics)

**Edition Notes**

Statement | Moshe Rosenfeld. |

Series | NASA technical memorandum -- 101016. |

Contributions | Ames Research Center. |

The Physical Object | |
---|---|

Format | Microform |

Pagination | 1 v. |

ID Numbers | |

Open Library | OL15284539M |

unsteady incompressible viscous ﬂow Jian-Guo Liu1, Jie Liu2, and Robert L. Pego3 Abstract How to properly specify boundary conditions for pressure is a longstanding problem for the incompressible Navier-Stokes equations with no-slip boundary conditions. An analytical resolution of this issue stems from a recently developed formula for theFile Size: 1MB. Most of the real physical flows exhibit unsteadiness, although some turbulent flows can be simulated as quasi-steady ones, using the time-averaging concept of the Navier-Stokes equations and proper turbulence modelling. For example, flow inside blood vessels [1] or air flow around tall buildings [2] are highly unsteady incompressible flows.

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VISCOUS FLOWS IN GENERALIZED COORDINATE SYSTEMS Moshe Rosenfeld* and Dochan Kwakt NASA Ames Research Center, Moffett Field, CA 1 Summary Several numerical solutions of the three-dimensional unsteady incompressible Navier-Stokes equations in gener- alized coordinate systems are presented in this work.

Rosenfeld M., Kwakt D. () Numerical simulation of unsteady incompressible viscous flows in generalized coordinate systems.

In: Dwoyer D.L., Hussaini M.Y., Voigt R.G. (eds) 11th International Conference on Numerical Methods in Fluid Dynamics. Lecture Notes in Physics, vol Springer, Berlin, Heidelberg. First Online 26 May Cited by: 3. Get this from a library. Numerical simulation of unsteady incompressible viscous flows in generalized coordinate systems.

[Moshe Rosenfeld; Ames Research Center.]. Numerical Simulation of 3-D Incompressible Unsteady Viscous Laminar Flows Numerical simulation of 3-D Incompressible Unsteady Viscous Laminar Flows: The Test Problems Multidomain Technique for 3-D Incompressible Unsteady Viscous Laminar Flow around Prolate Spheroid.

K.-C. Le Thanh. Numerical simulations of incompressible flows M. Hafez. This book consists of 37 articles dealing with simulation of incompressible flows and applications in many areas. It covers numerical methods and algorithm developments as well as applications in aeronautics and other areas.

Higher order approach of Kinetically Reduced Local Navier–Stokes (KRLNS) equations are applied for two-dimensional (2-D) simulations of Womersley problem and doubly periodic shear layers in order to demonstrate the accuracy, efficiency and the capability to capture the correct transient behavior for unsteady incompressible viscous by: 8.

Here U 0 is the representative velocity. In this simulation, U 0 = 1 was used. The (a)-(d) in both Figs. 2 and 3 show the enstrophy contours on the x-y plane at the position z = L and L in the direction of z axis obtained by the KRLNS equations for four different order approximations tested and M a = at non-dimensional time t = 1, integrated by using time step Δ t = 2 × 10 − 5 Cited by: 4.

For the determination of viscous incompressible flows the stream-function formulation for the fourth-order equation [2, 3], an artificial compressibility method [4], and a modified velocity.

Numerical Solution of Viscous Incompressible Flows Article in Annual Review of Fluid Mechanics 6(1) November with 37 Reads How we measure 'reads'. Introduction to the Numerical Analysis of Incompressible Viscous Flows provides the foundation for understanding the interconnection of the physics, mathematics, and numerics of the incompressible case, which is essential for progressing to more complex by: Yongtao Wei and Philippe H.

Geubelle, A comparative study of GLS finite elements with velocity and pressure equally interpolated for solving incompressible viscous flows, International Journal for Numerical Methods in Fluids, 61, 5, (), (). To date, only a limited number of unsteady, three-dimensional solutions of the incompressible Navier-Stokes equations in generalized coordinate systems have been reported (ref.

Therefore, the purpose of the present study is to develop and validate an accurate, unsteady, viscous, incompressible flow solver for arbitrary geometries. unsteady ﬂow around a cylinder in 2D and 3D. The discrepancy in results for the lifting force shows that more research is needed to develop suﬃciently robust and reliable methods.

Numerical methods for incompressible viscous ﬂow is a major part of the rapidly growing ﬁeld computational ﬂuid dynamics (CFD). CFD is now. Numerical Investigation: Unsteady Flow of an Incompressible Elastico-Viscous Fluid in a Tube of Spherical Cross Section on a Porous Boundary.

Sanjay B. Kulkarni 1, Hasim Chikte 2, Murali Mohan 2. 1 Department of Science and Humanities, Finolex Academy of Management and Technology, Ratangiri, Maharashtra, India. 2 Department of Mechanical Engineering, Finolex Academy of Management and Author: Sanjay B.

Kulkarni, Hasim Chikte, Murali Mohan. Solution methods for the Unsteady Incompressible Navier-Stokes Equations. MEB/3/GI 2 Unsteady flows The algorithms we introduced so far are time-marching: The only force acting is the viscous drag on the wall Navier-Stokes equations Velocity distribution Wall shear stress V wall Size: KB.

Numerical solution of 2D and 3D viscous incompressible steady and unsteady flows using artificial compressibility method. Louda. artificial compressibility method is used to solve steady and unsteady flows of viscous incompressible fluid.

Petr Louda and Karel Kozel, On numerical simulation of three-dimensional flow problems. A domain decomposition approach has been developed to solve for flow around multiple objects.

The method combines features of mask and multigrid algorithm implemented within the general framework of a primitive variable, pseudospectral elements formulation of fluid flow : Hwar-Ching Ku, Bala Ramaswamy. This article presents a numerical algorithm using the Meshless Local PetrovGalerkin (MLPG) method for numerical simulation of unsteady incompressible flows, governed by the Navier–Stokes equations via the stream function–vorticity (ψ–ω) formulation.

The driven flow in Author: Iraj Saeedpanah. fractional step and imcompressible viscous flows #1: Annie Guest. Posts: n/a Dear all, I want to compute three-dimensional,unsteady imcompressible viscous flows with free surface. "A fractional step solution method for unsteady incompressible Navier-Stokes equations in generalized coordinate systems," J.

Comput. Phys, pp. Numerical simulation of incompressible viscous flow in deforming domains. We demonstrate the method on the specific example of viscous incompressible flow in an axisymmetric deforming tube.

The end result is a method that retains the advantages of the BCG algorithm but for the more general case of flows in deforming by: 6. On simulation of outflow boundary conditions in finite An unsteady viscous incompressible Navier–Stokes flow in a channel with a moving damper is modeled.

An accurate comparison and analysis of numerical and mechanical situations seems natural for simulations of unsteady flows, especially when finite difference (FD) schemes are used. This chapter is intended to present to readers a general scope of the technical, theoretical, and numerical applications of computational fluid dynamics using the finite volume method, restricted to incompressible turbulent flows (Ma Cited by: 1.

conditions is the main problem in the numerical simulation of incompressible viscous flows. The real-life problems are usually three-dimensional which tremendously increase the computation load.

Hence, efficient and accurate numerical methods are essential to the development of CFD techniques. The stream function–vorticity formulation [1] and. Keywords: two-dimensional vertical incompressible viscous flow, Navier-Stokes equation, water splash effects, numerical simulation 1.

Introduction In many hydraulic engineering problems the free surface rapidly varied flows are encountered, especially including water jets, hydraulic jumps, flow over and under gates, collapse of water wall.

unsteady ﬂow around a cylinder in 2D and 3D. The discrepancy inresults for the lifting force shows that more research is needed to develop suﬃciently robust and reliable methods.

Numerical methods for incompressible viscous ﬂow is a major part of the rapidly growing ﬁeld computational ﬂuid dynamics (CFD). CFD is now. On the exact solution of incompressible viscous flows with variable viscosity A. Fatsis1, J. Statharas2, A. Panoutsopoulou3 & N.

Vlachakis1 1Technological University of Chalkis, Department of Mechanical Engineering, Greece 2Technological University of Chalkis, Department of Aeronautical Engineering, Greece 3Hellenic Defence Systems, Greece Abstract. () An efficient numerical method for the equations of steady and unsteady flows of homogeneous incompressible Newtonian fluid.

Journal of Computational Physics() A pressure-correction scheme for convection-dominated incompressible flows with discontinuous velocity and continuous by: 11th International Conference on Numerical Methods in Fluid Dynamics.

Editors: Dwoyer, Douglas L., Numerical simulation of unsteady incompressible viscous flows in generalized coordinate systems. Numerical simulation of unsteady internal compressible ﬂows has been the goal of many researchers over the years and several algorithms have already been presented.

Mary et al [4] proposed a second-order accurate algorithm for the simulation of unsteady viscous stratiﬁed compressible ﬂows. The advantage of their method is its capability.

() A consistent splitting scheme for unsteady incompressible viscous flows I. Dirichlet boundary condition and applications. International Journal for Numerical Methods in Fluids() A level set discontinuous Galerkin method for free surface by: numerical simulation of two-dimensional incompressible viscous flows past obstacles.

François Bouchon, Thierry Dubois, Nicolas James To cite this version: François Bouchon, Thierry Dubois, Nicolas James. A second-order immersed boundary method for the numerical simulation of two-dimensional incompressible viscous flows past obstacles.

Simulation of time-dependent compressible viscous flows using central and upwind-biased finite difference techniques Hall, Edward Joseph, Ph.D.

Iowa State Cited by: 1. Unfortunately, this book can't be printed from the OpenBook. Visit to get more information about this book, to buy it in print, or to download it as a free PDF.

of the numerical simulations. While spectacular results have been achieved for compressible ﬂow problems, progress for unsteady viscous incompressible ﬂows has been more modest; see, e.g., H´etu and Pelletiert (). For unsteady problems, a fast dynamic remeshing algorithm is required.

The Mathematical Theory of Viscous Incompressible Flow Paperback – J to a class of generalized functions defined in the distributional sense. Thus existence of solution in the new class is a necessary but not sufficient condition for existence in the classical sense.

steady and unsteady forms of the equations and both finite Cited by: involved in the numerical simulation, and a Finite Volume Method was use to discretize the equations of an Incompressible Viscous Flow.

This work analyzes classical problems of bidimensional flow, such as the inlet region of a Poiseuille flow, lid-driven cavity, backward-facing step and free convection with Boussinesq approximation. tion of two rigid ﬂaps in an unsteady ﬂow in a channel and observe their movement as a result of ﬂuid-structure interaction.

In our ﬁrst numerical experiment, a channel of dimensions (0,1) × (0,3) was considered. The length and width of two ﬂaps were andrespectively. The ﬁxed points were A 1 = (0,2) and A 2 = (1,2 File Size: 1MB. Numerical Simulation of Incompressible Two{Phase Flows with a Boussinesq{Scriven Interface Stress Tensor Arnold Reusken and Yuanjun Zhang Bericht Nr.

September Key words: Two{phase ow, viscous interface, Boussinesq{Scriven AMS Subject Classi cations: 35Q30, 65M60 Institut fur Geometrie und Praktische Mathematik RWTH Aachen. incompressible ﬂow of viscous ﬂuid B. Emek Abali ∗† Abstract Despite its numerical challenges, ﬁnite element method is used to compute viscous ﬂuid ﬂow.

A consensus on the cause of numerical problems has been reached; however, general algorithms—allowing a robust and accurate simulation for any process—are still missing.

Numerical Simulation of Incompressible Flows using Immersed Boundary Method Considering the Pressure Condition the numerical simulations of incompressible ﬂow around a heart I. immersed elastic ﬁbers in a viscous incompressible ﬂuid. Journal of Computational Physics,File Size: 1MB.

In physics, the Navier–Stokes equations (/ n æ v ˈ j eɪ s t oʊ k s /), named after French engineer and physicist Claude-Louis Navier and Anglo-Irish physicist and mathematician George Gabriel Stokes, describe the motion of viscous fluid substances. These balance equations arise from applying Isaac Newton's second law to fluid motion, together with the assumption that the stress in [email protected]{osti_, title = {A finite-difference scheme for three-dimensional incompressible flows in cylindrical coordinates}, author = {Verzicco, R and Orlandi, P}, abstractNote = {A finite-difference scheme for the direct simulation of the incompressible time-dependent three-dimensional Navier-Stokes equations in cylindrical coordinates is presented.Abstract The issue of open (outflow) boundary conditions is important to the numerical simulation of incompressible viscous flows.

But there are few studies of this problem because it is very difficult to give mathematically exact conditions for finite and artificial boundaries.