... Computation of Internal and External Flows Volume Fundamentals of Computational Fluid Dynamics This page intentionally left blank Numerical Computation of Internal and External Flows Volume Fundamentals ... to the definition of temperature as a measure of the mean kinetic energy of the gas molecules; to a definition of pressure as a result of the impulse of molecules on the walls of the body containing ... 2.1.1.2 Flow around a circular cylinder 77 2.1.2 Direct Numerical Simulation of Turbulent Flows (DNS) 83 2.2 Approximations of turbulent flows 86 2.2.1 Large Eddy Simulation (LES) of Turbulent Flows...
Ngày tải lên: 01/04/2014, 10:56
... eld of aerodynamics, all of these phenomena are governed by the compressible Navier-Stokes equations Many of the most important aspects of these relations are nonlinear and, as a consequence, often ... level of accuracy needed, the turnaround time required, and the solution parameters of interest The rst two of these requirements are often in ict and compromise is necessary As an example of solution ... class of problems of interest 1.2.4 Assessment and Interpretation of Results Finally, the results of the simulation must be assessed and interpreted This step can require post-processing of the...
Ngày tải lên: 17/03/2014, 14:01
Fundamentals of computational fluid dynamics h lomax, t pulliam, d zingg
... eld of aerodynamics, all of these phenomena are governed by the compressible Navier-Stokes equations Many of the most important aspects of these relations are nonlinear and, as a consequence, often ... level of accuracy needed, the turnaround time required, and the solution parameters of interest The rst two of these requirements are often in ict and compromise is necessary As an example of solution ... class of problems of interest 1.2.4 Assessment and Interpretation of Results Finally, the results of the simulation must be assessed and interpreted This step can require post-processing of the...
Ngày tải lên: 17/03/2014, 14:25
Fundamentals of Compressible Fluid Mechanics docx
... OpenOffice, Abiword, and Microsoft Word software, are not appropriate for these projects Further, any text that is produced by Microsoft and kept in “Microsoft” format are against the spirit of ... because of the lack of understanding of fluid mechanics in general and compressible in particular For example, the lack of competitive advantage moves many of the die casting operations to off shore9 ... picture of a shock wave (see figure 1.7) He utilized the variations of the air density to clearly show shock line at the front of the bullet Mach had good understanding of the fundamentals of supper...
Ngày tải lên: 29/03/2014, 00:20
Fundamentals Of Geophysical Fluid Dynamics Part 1 pdf
... Equation of State: The equation of state for seawater, ρ(T, S, p), is known only by empirical evaluation, usually in the form of a polynomial expansion series in powers of the departures of the ... Fundamental Dynamics integral of the tangential component of velocity around a closed line C By Stokes’ integral relation, it is equal to the area integral of the normal projection of the vorticity through ... neighborhood of x = x0 : dq d2 q (x0 ) + (x − x0 )2 (x0 ) + dx dx For the true oceanic equation of state, (2.33) is only the start of a Taylor series expansion in the variations of (T, S, p)...
Ngày tải lên: 09/08/2014, 11:21
Fundamentals Of Geophysical Fluid Dynamics Part 2 ppt
... each of its arguments is a function of a single variable, here y In a zonal flow, all other flow quantities (e.g., ψ, φ, ζ, q) are functions only of the coordinate y Vortex Flow: A simple example of ... in Davis Strait (north of the Labrador Sea, west of Greenland) during June 2002 Both vortex types are mesoscale vortices with horizontal diameters of 10s-100s km (Courtesy of Jacques Descloirest, ... dynamics This is an example of barotropic flow using either of its common definitions, ∂z = (sometimes enforced by taking a depth average of a 3D flow) or φ × ρ = (The opposite of barotropic is baroclinic;...
Ngày tải lên: 09/08/2014, 11:21
Fundamentals Of Geophysical Fluid Dynamics Part 3 potx
... that the limit of vanishing separation and width is a delicate one 3.2.2 Chaos and Limits of Predictability An important property of chaotic dynamics is the sensitive dependence of the solution ... either be viewed as a definition of νe (y) as a diagnostic measure of the eddy–mean interaction or be utilized as a parameterization of the process with some specification of νe (Sec 6.1.3) When this ... outcome of successive mergers between pairs of vortices is a vortex population with fewer vortices that have larger sizes and circulations Finally, because of the sensitive dependence of these...
Ngày tải lên: 09/08/2014, 11:21
Fundamentals Of Geophysical Fluid Dynamics Part 4 pptx
... Thus, the dynamics of a Kelvin wave is a hybrid combination of the influences of rotation and stratification The ocean is full of Kelvin waves near the coasts, generated as part of the response to ... of vortex stretching The latter can be understood in terms of the Lagrangian conservation of circulation, as in Kelvin’s Circulation Theorem (Sec 3.1.1) For a material parcel with the shape of ... accompanied by some amount of local turbulence and mixing Tidal bores commonly occur at special sites, e.g., the Bay of Fundy along the Atlantic coast of Canada or the northeast corner of Brittany (near...
Ngày tải lên: 09/08/2014, 11:21
Fundamentals Of Geophysical Fluid Dynamics Part 5 docx
... an isolated wave of elevation (Fig 4.11), the characteristics converge on the forward side of the wave and diverge on the backward side This leads to a steepening of the front of the wave form ... idealized problem for the statistical equilibrium of a baroclinic zonal jet is analyzed at the end of the chapter Of course, there are many other aspects of baroclinic dynamics (e.g., vortices and waves) ... attractiveness of the isentropic Primitive Equations is the disappearance of any explicit vertical velocity in the advection operator; this occurs as a result of the parcel conservation of (potential)...
Ngày tải lên: 09/08/2014, 11:21
Fundamentals Of Geophysical Fluid Dynamics Part 6 ppt
... therefore positive, v T > The sign of v T is directly ˜ related to the range of values for θ, i.e., to the upshear vertical phase tilt (Sec 5.2.2) 5.2.4 Effects on the Mean Flow The nonzero eddy heat ... in different layers Note the intensification of the mean jet toward the surface and the middle of the channel y ρN z=B south y n=1 north Fig 5.12 Sketch of a meridional cross-section for the time-mean ... consequence of the eddy mixing of qQG , sometimes called potential-vorticity homogenization, in a layer without significant non-conservative forces; Sec 5.3.4); • mean upwelling on the poleward side of...
Ngày tải lên: 09/08/2014, 11:21
Fundamentals Of Geophysical Fluid Dynamics Part 7 pdf
... = Fig 5.18 Sketch of radiating Rossby waves from a zonal strip of transient forcing, F∗ (x, y, t) (shaded area); the pattern of Rossby wave crests and troughs (i.e., lines of constant wave phase) ... (6.6) Of course, F = ν u cannot be neglected in (6.1) since a characteristic of turbulence is that the advective cascade of variance dynamically connects the large-scale fluctuations on the scale of ... release of mean available potential energy These behaviors are hallmarks of baroclinic instability (Sec 5.2) The equilibrium heat balance at the layer interfaces is obtained by a reinterpretation of...
Ngày tải lên: 09/08/2014, 11:21
Fundamentals Of Geophysical Fluid Dynamics Part 8 pptx
... [deg.] 40 20 Re 0 500 1000 Fig 6.7 Sketch of clockwise rotated angle, β, of the surface velocity relative to ui as a function of Re within the regime of fully developed turbulence, based on 3D ... viscosity value of νe = 03 u2 ∗ = 0.13 u∗ h∗ f (6.47) The second relation is consistent with widespread experience that eddy viscosity magnitudes diagnosed from the negative of the ratio of eddy flux ... the left of the interior current, though by less than the 45o of the laminar profile (Fig 6.7), and the currents spiral with height, though less strongly so than in the laminar Ekman layer Of course,...
Ngày tải lên: 09/08/2014, 11:21
Fundamentals Of Geophysical Fluid Dynamics Part 9 pot
... many Much of the GFD literature is an exploration of different combinations of the basic ingredients, always with the goal of discovering better paradigms for understanding the outcome of experiments, ... comprises GFD A comparison of the material here with other survey books (e.g., those cited in the Bibliography) indicates the great breadth of the subject, and, of course, the bulk of the scientific record ... the actual complexity of geophysical flows evident in measurements and computational simulations Afterword This book, of necessity, gives only a taster’s sampling of the body of posed and partially...
Ngày tải lên: 09/08/2014, 11:21
Computation of compressible fluid flow
... the study of fluid dynamics It nicely and synergistically complements the other two approaches of pure theory and pure experiment in the study and development of the whole discipline of fluid dynamics ... M ∞ = 0.75, α = 3.0° Solutions of flows over multi-component objects Case 1: Flow over dual NACA 0012 airfoils Case 2: Flow over NLR with flap airfoil Case 3: Flow over 3-element airfoil Additional ... velocity 5.2 2-D solution of flow over circular cylinder 5.3 3-D solution of flow over uniform wing 5.4 Additional remarks 63 63 64 65 67 69 73 77 Conclusion 79 List of References 81 iv Summary...
Ngày tải lên: 03/10/2015, 21:56
Numerical computation of the fluid flow and heat transfer between the annuli of concentric and eccentric horizontal cylinders
... the flow and thermal fields have been studied extensively by many researchers The mixed-convective flow in an annulus due to rotation of the cylinder in the absence of bulk axial flow is one of ... present study, the effects of various system parameters such as the geometry of the annulus, the properties of the fluid and the rotation rate of the outer cylinder on the flow and the heat transfer ... counter-clockwise The effects of various parameters such as the radius ratio of the annulus, the eccentricity of the annulus, the Rayleigh number and Reynolds number of the rotation of the inner cylinder...
Ngày tải lên: 27/11/2015, 11:12
Fundamentals of compressible fluid mechanics
... three models of choked flow: Isothermal flow1 2 , Fanno flow and Rayleigh flow First, the Isothermal flow is introduced because of the relative ease of the analytical treatment Isothermal flow provides ... because of the lack of understanding of fluid mechanics in general and compressible in particular For example, the lack of competitive advantage moves many of the die casting operations to off shore9 ... Isothermal Flow basic parameters 165 The flow parameters for unchoked flow 170 xiii xiv LIST OF TABLES 9.2 The flow parameters for unchoked flow...
Ngày tải lên: 10/03/2016, 11:39
Fundamentals of the finite element method for heat and fluid flow lewis, nithiarasu,seetharamu
... Fundamentals of the Finite Element Method for Heat and Fluid Flow Fundamentals of the Finite Element Method for Heat and Fluid Flow Roland W Lewis University of Wales Swansea, ... some of the 3-D results presented in this text Professor Seetharamu acknowledges Professor Ahmed Yusoff Hassan, Associate Professor Zainal Alimuddin and Dr Zaidi Md Ripin of the School of Mechanical ... version of discrete systems, and the accuracy of the solution can be controlled by changing the number of unknowns and elements The Fundamentals of the Finite Element Method for Heat and Fluid Flow...
Ngày tải lên: 17/03/2014, 13:53
doe fundamentals handbook - thermodynamics, heat transfer, and fluid flow - volume 1 of 3
... Rev HT Department of Energy Fundamentals Handbook THERMODYNAMICS, HEAT TRANSFER, AND FLUID FLOW Module Thermodynamics Thermodynamics TABLE OF CONTENTS TABLE OF CONTENTS LIST OF FIGURES ... Inches of water c Inches of mercury d Millimeters of mercury e Microns of mercury Temperature Temperature is a measure of the molecular activity of a substance The greater the movement of molecules, ... force that exists in a column of fluid at a certain height The most common of these are inches of water, inches of mercury, millimeters of mercury, and microns of mercury Conversion factors are...
Ngày tải lên: 17/03/2014, 15:00
doe fundamentals handbook - thermodynamics, heat transfer, and fluid flow - volume 2 of 3
... Rev HT Department of Energy Fundamentals Handbook THERMODYNAMICS, HEAT TRANSFER, AND FLUID FLOW, Module Heat Transfer Heat Transfer TABLE OF CONTENTS TABLE OF CONTENTS LIST OF FIGURES ... ft The temperature of the inner surface of the pipe is 12 2oF and the temperature of the outer surface is 11 8oF The thermal conductivity of the stainless steel is 108 Btu/hr-ft -oF Calculate the ... convection Convection Convection involves the transfer of heat by the motion and mixing of "macroscopic" portions of a fluid (that is, the flow of a fluid past a solid boundary) The term natural convection...
Ngày tải lên: 17/03/2014, 15:00
doe fundamentals handbook - thermodynamics, heat transfer, and fluid flow - volume 3 of 3
... Rev HT Department of Energy Fundamentals Handbook THERMODYNAMICS, HEAT TRANSFER, AND FLUID FLOW, Module Fluid Flow blank Fluid Flow TABLE OF CONTENTS TABLE OF CONTENTS LIST OF FIGURES ... the degree of turbulence of the flow Flow Regimes All fluid flow is classified into one of two broad categories or regimes These two flow regimes are laminar flow and turbulent flow The flow regime, ... transfer to the fluid Laminar Flow Laminar flow is also referred to as streamline or viscous flow These terms are descriptive of the flow because, in laminar flow, (1) layers of water flowing over...
Ngày tải lên: 17/03/2014, 15:00