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Topic: Inviscid

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Fluid Dynamics

Reynolds number

Euler equations

	Viscous-Inviscid Interaction
		Development of a coupling algorithm is a very difficult task, that is somewhat dissociated from the domain of validity of the equations that describe the viscous flow.
		This scheme, that is probably the most robust viscous-inviscid formulation for airfoil flows, presents difficulties in three dimensions, due to the enormous size of the jacobian matrix that has to be inverted.
		This was the first attempt to solve time-consistent flows, with both viscous and inviscid solvers implicit in time, and the coupling algorithm performed by a relaxation at each time-step.
	aerodyn.org /CFD/Vii/vii.html (769 words)

	Fluid dynamics - Encyclopedia.WorldSearch (Site not responding. Last check: 2007-11-07)
		The standard equations of inviscid flow are the Euler equations.
		Another often used model, especially in computational fluid dynamics, is to use the Euler equations far from the body and the boundary layer equations close to the body.
		If a problem is incompressible, irrotational, inviscid, and steady, it can be solved using potential flow, governed by Laplace's equation.
	encyclopedia.worldsearch.com /fluid_dynamics.htm (893 words)

	Stability References-Alabduljalil (Site not responding. Last check: 2007-11-07)
		Brevdo, L. 1993 On the linear stability of a compressible inviscid parallel shear flow.
		Michalke, A. 1964 On the inviscid instability of the hyperbolic-tangent velocity profile.
		Barston, E. 1991 On the linear stability of inviscid incompressible plane parallel flow.
	www.4saad.com /Research/ref.htm (1375 words)

	Recent Papers
		It is shown that the flow in a small vicinity of the separation point is governed, as usual, by strong interaction between the boundary layer and inviscid part of the flow.
		Outside the interaction region the Karman-Guderley equation describing transonic inviscid flow admits a self-similar solution with the pressure on the body surface being proportional to the cubic root of the distance from the separation point.
		Interaction between the boundary layer on a smooth body surface and the outer inviscid compressible flow in the vicinity of a sonic point is considered.
	www.ma.man.ac.uk /~ruban/recentpapers.html (1178 words)

	Viscous-Inviscid Interaction, Quasi-Simultaneous Methods (Site not responding. Last check: 2007-11-07)
		Veldman recognized the importance of solving simultaneously the viscous and inviscid flow equations.
		The coupling is advanced station-by-station between a linearized form of the inviscid flow and the boundary layer equations.
		Veldman used a local linearization of the viscous effects on the external inviscid flow from the thin airfoil theory
	aerodyn.org /CFD/Vii/node5.html (149 words)

	Verification Cases
		This verification case involves the computation of the inviscid, supersonic (Mach 2.5) flowfield past a wedge with a half-angle of 15 degrees.
		The results are compared with analytic, perfect gas results, which indicates a Mach number of 1.873, a pressure ratio across the shock of 2.468, a temperature jump of 1.322, and a shock angle of 36.944 degrees.
		This verification case involves unsteady, inviscid flow with a standing shock moving in a duct.
	www.lerc.nasa.gov /WWW/wind/valid/verifcases.html (893 words)

	Navier-Stokes Equations: Inviscid Flows (Site not responding. Last check: 2007-11-07)
		The mass equation (Iv3) is, of course, unchanged with the neglect of viscosities.
		This latter observation is the true significance of the boundary layer, i.e., its existence permits the fluid mechanist to employ the simplification of the inviscid approximation.
		Although the no-slip and heat flux conditions are ignored in the inviscid approximation, both the kinematic and the dynamic boundary conditions must be applied in the usual way.
	www.navier-stokes.net /nsinv.htm (887 words)

	IRROTATIONAL FLOW OF AN INVISCID FLUID (Site not responding. Last check: 2007-11-07)
		This lecture is devoted to the study of irrotational plane flows of an inviscid fluid.
		In the absence of shear stresses, forces exerted on a body - the wing in this case - by an inviscid fluid are always normal to the surface and due to the pressure.
		This apparent paradox can only be solved by dropping the hypothesis of irrotational (and inviscid) flow in a region close to the body (boundary layer) where viscosity plays a fundamental role and the flow is rotational and viscous.
	www.diam.unige.it /~irro/lecture_e.html (436 words)

	Navier-Stokes Equations: Shock Jump Conditions for Inviscid Navier-Stokes Fluids (Site not responding. Last check: 2007-11-07)
		In everyday life, shock waves are commonly experienced as the crash of thunder, the crack of a whip, or the sound of a gunshot or firecracker.
		In a Navier-Stokes fluid, shock waves are usually associated with inviscid flows.
		Conditions (47)-(48) express conservation of linear momentum through the shock and are the counterparts of (32) or, because the inviscid approximation has been applied here, (Iv4).
	www.navier-stokes.net /nssj.htm (833 words)

	Method of Characteristics
		Inviscid Burgers' equation is not of the form of the linear first order PDE (1), as it is nonlinear, so our earlier analysis do not apply directly.
		In the applet, observe in the shock problems for inviscid Burgers' equation how the plotted weak solutions appear to be applying this equal area rule to the multivalued solutions produced by the method of characteristics.
		For the inviscid Burgers' problem with the sine wave, N-wave, and single hump initial data, the applet uses a numerical method to approximate the exact entropy satisfying weak solution.
	www.scottsarra.org /shock/shock.html (2578 words)

	Learn more about Fluid mechanics in the online encyclopedia. (Site not responding. Last check: 2007-11-07)
		Another often used model, especially in computational fluid mechanics, is to use the Euler equations far from the body and the boundary layer equations close to the body.
		Another simplification of fluid mechanics equations is to set all changes of fluid properties with time to zero.
		If a problem is both incompressible, inviscid, and steady, it can be solved using potential flow, governed by LaPlace's equation.
	www.onlineencyclopedia.org /f/fl/fluid_mechanics_1.html (961 words)

	[No title] (Site not responding. Last check: 2007-11-07)
		Of particular interest is the dependence of the critical deflection angle (when a well attached flow turns into a separated flow) on the Karman-Guderley parameter.
		In accordance with the procedure adopted, the analysis of the flow starts with the solution of the K\'arm\'an-Guderley equation describing the inviscid part of the flow near the corner point.
		The analysis of the inviscid transonic flow has been performed based on hodograph method and new far field boundary conditions has been obtained corresponding to the present flow topology.
	www.ma.man.ac.uk /~mbbxfit2/publications.html (494 words)

	Wind-US User's Guide - Keyword Reference, TURBULENCE
		This keyword is used to request an inviscid or viscous solution, and to select a turbulence model for one or more zones.
		However, it may be used with inviscid or laminar flow in other zones.
		An additional keyword may be used with the SST model to specify the maximum wall distance.
	www.lerc.nasa.gov /WWW/winddocs/alpha/user/keywords/turbulence.html (3542 words)

	RTN Planets Network - Comparison Project
		The figures show dT/dr calculated from the snapshots as a function of radius excluding the contribution from the Roche lobe.
		Inviscid, Jupiter: 2 5 10 20 50 100 200 500
		Inviscid, Neptune: 2 5 10 20 50 100 200 500
	www.astro.su.se /groups/planets/comparison/torques.html (179 words)

	Essam M. Wahba
		To quantitatively assess the merits of this new approach, a wide range of inviscid and viscous flow problems are simulated spanning the Mach number range from incompressible to supersonic flows with special emphasis on transonic flows.
		Leonhard Euler (1707-1783): He developed the concept of the material derivative and in turn was able to derive the governing equations for inviscid fluid motion.
		Jean le Rond D'Alembert (1717-1783): Well known for D'Alembert's paradox which states that there is no drag exerted on a body immersed in an inviscid free stream, this led to wide criticism of the invsicd theory and in turn led to the rise of experimental fluid mechanics.
	mae.ucdavis.edu /~ewahba (1949 words)

	Bookworkz.com: Inviscid Incompressible Flow
		A comprehensive, modern account of the flow of inviscid incompressible fluids This one-stop resource for students, instructors, and professionals goes beyond analytical solutions for irrotational fluids to provide practical answers to real-world problems involving complex boundaries.
		Inviscid Incompressible Flow supplies a rigorous introduction to the continuum mechanics of fluid flows.
		Inviscid Incompressible Flow, the only all-in-one presentation available on this topic, is a first-rate teaching and learning tool for graduate- and senior undergraduate-level courses in inviscid fluid dynamics.
	www.bookworkz.com /construction/mechanical/0471375667.html (326 words)

	Lift-Dependent Drag Items
		The inviscid (vortex) drag includes a zero-lift term due to twist, and lift-dependent parts that depend on the twist and planform.
		The remaining portion of the "induced" drag, the so-called viscous part, is chiefly due to the increase of skin friction and pressure drag with changes in angle of attack.
		Apart from this factor, the expression for inviscid inviscid drag of the wing alone shows how planform and twist affect the drag.
	adg.stanford.edu /aa241/drag/induceddrag.html (1422 words)

	No Title
		Their goal was to determine the condition for which a perturbation resulting from an adverse gradient of angular momentum is unstable.
		Here we first consider Rayleigh's inviscid flow theory, and then perform a perturbation analysis for the thin-gap limit of the viscous Couette flow examined by Taylor.
		He found that when the two cylinders rotate in the same direction, Rayleigh's criterion for inviscid flow still holds, with a small added region of stability.
	www.deas.harvard.edu /brenner/taylor/handouts/taylor_couette (860 words)

	A toy demonstration of inviscid mixing.
		I wrote a more primitive applet a long time ago to demonstrate inviscid mixing in a simple rotating fluid.
		I wrote this applet to demonstrate inviscid mixing, but you can do whatever you want with it.
		Effective inviscid mixing can intermingle the passive quantity among the bulk fluid so that the distances are very small.
	www.math.udel.edu /~rossi/mixing (966 words)

	IHS ESDU: Data Item 00023
		ESDU 00023 presents examples of the application of constrained multivariate optimisation techniques in inviscid flow.
		ESDU 00023 compares the behaviour of BVGK (inviscid) with the Euler code in identical transonic CODAS studies.
		The particular case being used in these examples is that of deflection of simple leading- and trailing-edge flaps on the combat aircraft aerofoil used in ESDU 00022.
	www.esdu.com /graphics/dataitem/00023.htm (387 words)

	Fluid mechanics -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-07)
		The standard equations of inviscid flow are the (Click link for more info and facts about Euler equations) Euler equations.
		Another often used model, especially in computational fluid dynamics, is to use the (Click link for more info and facts about Euler equations) Euler equations far from the body and the (The layer of slower flow of a fluid past a surface) boundary layer equations close to the body.
		If a problem is incompressible, irrotational, inviscid, and steady, it can be solved using (Click link for more info and facts about potential flow) potential flow, governed by (Click link for more info and facts about Laplace's equation) Laplace's equation.
	www.absoluteastronomy.com /encyclopedia/f/fl/fluid_mechanics.htm (2503 words)

	Re: Inviscid flow over a forward/backward facing s
		Inviscid flow over a forward/backward facing step - Abhijit Tilak, Wed, 19 Jan 2005, 10:44 a.m.
		Re: Inviscid flow over a forward/backward facing s - noName, Wed, 19 Jan 2005, 11:26 a.m.
		Re: Inviscid flow over a forward/backward facing s - bouahmed, Wed, 16 Feb 2005, 7:18 a.m.
	www.cfd-online.com /Forum/main_archive.cgi?read=34880 (121 words)

	Generalized Circle and Sphere Theorems for Inviscid and Viscous Flows
		Generalized Circle and Sphere Theorems for Inviscid and Viscous Flows: SIAM Journal on Applied Mathematics Vol.
		The circle and sphere theorems in classical hydrodynamics are generalized to a composite double body.
		In the case of three-dimensional axisymmetric viscous flows, a Faxen relation for the force acting on the composite bubble is derived.
	epubs.siam.org /sam-bin/dbq/article/37459 (232 words)

	Re: Inviscid flow over a forward/backward facing s
		Inviscid flow over a forward/backward facing step (Abhijit Tilak)
		None of these are inviscid, but they might serve as a good starting point for finding the data you need.
		Re: Inviscid flow over a forward/backward facing s - Abhijit Tilak, Fri, 21 Jan 2005, 7:49 a.m.
	www.cfd-online.com /Forum/main_archive.cgi?read=34838 (209 words)

	Rayleigh's Inviscid Instability Argument
		To study the stability of inviscid circular flow between concentric cylinders, Lord Rayleigh developed an analogy with the stability of a fluid of variable density under the force of gravity.
		To examine this argument, consider a ring of fluid in a flow field with a velocity distribution
		In an inviscid fluid, the angular momentum of a small fluid element is conserved.
	www.deas.harvard.edu /brenner/taylor/handouts/taylor_couette/node2.html (631 words)

	IHS ESDU: Data Item 70008
		70008: Inviscid supersonic flow past cones at zero incidence: (i) shock angle.
		ESDU 70008, which is one of a series of four, presents data for the shock angle of a sharp-nosed right-circular cone at zero incidence in a uniform, inviscid, supersonic airflow.
		The data, given in carpet form, are for upstream Mach numbers increasing from the shock detachment value to a value of 4 for cones with semi-vertex angles from zero to 50 degrees and were obtained from an exact solution of the conical flow equations.
	www.esdu.com /graphics/dataitem/70008.htm (113 words)

	[No title] (Site not responding. Last check: 2007-11-07)
		If flow is inviscid, then zero gradient is used for pressure and certain boundary conditions (not discussed in this lab due to its complexity) are used for velocities.
		Data need to be saved: lift and drag coefficients Inviscid flow simulation Use the same conditions as those in exercise 1, except choose “inviscid” for “viscous model” and set up the boundary conditions following instructions part, set the iteration number to be (10000), and convergent limit to be 10-5.
		Zoom in the near wall region and describe the differences of velocity vectors near the airfoil surface for inviscid and viscous flows.
	www.engineering.uiowa.edu /~fluids/Lab/CFD_Prelab2.doc (2451 words)

	MF2 Inviscid flow (Site not responding. Last check: 2007-11-07)
		Ability to derive equations describing two-dimensional inviscid flow from general equations
		Understanding of the concepts of streamlines; stream function; vorticity; circulation; irrotational flows.
		Appreciation of lift and drag, their origins and the limits of inviscid flow theory.
	mail.bris.ac.uk /~memag/Teaching/MechFl/inviscid.htm (192 words)

	An Engineering Method for Interactive Inviscid-Boundary Layers in Three-Dimensional Hypersonic Flows - Riley ...
		(Under the direction of Dr. Fred R. DeJarnette.) An engineering method has been developed that couples an approximate threedimensional inviscid technique with the axisymmetric analog and a set of approximate convective-heating equations.
		The displacement effect of the boundary layer on the outer inviscid flow is calculated and included as a boundary condition in the...
		4 Inviscid Surface Streamlines and Heat Transfer on Shuttle-Ty..
	citeseer.ist.psu.edu /46317.html (725 words)

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