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• Sand box Approximation Schemes
  ... same mathematical form, and both have the effect of limiting the solution gradient near shocks or discontinuities. In general, the term flux limiter is used w ...when the limiter is equal to zero (sharp gradient, opposite slopes or zero gradient), the flux is represented by a ''low resolution scheme''. Similarly, when t
  26 KB (3,687 words) - 20:19, 7 November 2011
• Mesh adaptation
  ... the issue is very severe for shocks, the smaller the cell, the higher the gradient and the indicator would keep on picking the region, unless a threshold valu ...via the error indicators is often undertaken by using either the 'solution gradient' or 'soultion curvature'. Hence the refinement variable coupled with the re
  8 KB (1,236 words) - 09:43, 17 May 2012
• Johnson-King model
  ...solve only for turbulent boundary layer flows with strong adverse pressure gradient.
  735 B (103 words) - 05:48, 17 January 2012
• Best practice guidelines for heat transfer simulations
  ...id (say both are at the different temperature), there exists a temperature gradient between these two media and results in the energy transfer. If this fluid m
  2 KB (329 words) - 02:21, 7 April 2011
• Subgrid variance
  ...{sgs}''^2} </math> is a subgrid variance flux and is often modeled using a gradient approach with turbulent diffusivity.
  1 KB (242 words) - 11:19, 11 January 2006
• CHAM FAQ
  ...Stone's strongly implicit solver, but the option exists to use a Conjugate Gradient Residuals solver for each equation. ...t of solid obstructions enters the momentum equations through the pressure gradient, which is a built-in source rather than an externally imposed one - it does
  37 KB (5,717 words) - 12:46, 9 December 2019
• Heat transfer
  ...ed '''''heat'''''. The overall driving force for this heat flow is thermal gradient. Conduction heat transfer through a substance is because of a temperature ''gradient''. The ''rate'' of heat transfer by conduction between two regions of a sub
  6 KB (990 words) - 03:23, 17 February 2009
• Source term linearization
  ...ath>\left ( \frac {\partial S}{\partial \phi} \right ) ^* </math> is the gradient of S evaluated at <math>\phi_P^*</math>. <br>
  3 KB (441 words) - 10:25, 22 February 2007
• Scalar dissipation
  Under RANS assumptions gradient of the scalar fluctuations are much larger than gradients of the means,
  2 KB (246 words) - 16:41, 12 April 2007
• Skin friction coefficient
  ...references) the formula describing Cf over a flat plate , without pressure gradient, is Cf=0.0725*Re^(-1/5) and it is valid between 5x10^5<Re<10^7 with the as
  4 KB (516 words) - 12:14, 14 January 2016
• Introduction to turbulence/Reynolds averaged equations
  ...also like those in the mean motion, and represent the fluctuating pressure gradient and the fluctuating viscous stresses. The third term on the right-hand is i ...es, but note for now that simple gradient closure models never work unless gradient production dominates. This rules out many flows involving buoyancy, and als
  45 KB (7,578 words) - 08:35, 21 August 2013
• Introduction to turbulence/Turbulence kinetic energy
  * Rate of production of turbulence kinetic energy from the mean flow(gradient): ...thought of as the working of the Reynolds stress against the mean velocity gradient of the flow, exactly as the viscous stresses resist deformation by the inst
  47 KB (7,664 words) - 12:47, 13 December 2013
• J-FLO
  ...alculations proportional to the number of design variables to estimate the gradient. The computational costs become prohibitive as the number of design variabl ...lution cost is comparable to that of solving the flow equations. Thus, the gradient can be determined with roughly the computational costs of two flow solution
  2 KB (340 words) - 15:00, 15 December 2006
• CFD++
  ...ll-function treatment that models the effects of compressibility, pressure gradient and heat transfer. A single equation LES model and advanced hybrid LES/RANS
  3 KB (380 words) - 01:38, 17 January 2007
• PHOENICS
  ...Stone's strongly implicit solver, but the option exists to use a Conjugate Gradient Residuals solver for each equation.
  11 KB (1,641 words) - 11:18, 5 July 2013
• Cfd simulation of vortex shedding
  ...uation|continuity equation]] using pressure as a corrective quantity whose gradient in either the x or y direction is added to the velocity in the respective d
  4 KB (584 words) - 23:32, 29 October 2008
• Shape Design Optimization
  [[Direct design]] can be further classified into [[gradient-based methods]] and [[global search methods]]. Gradient-based methods will reach a local optimum design, while global search method
  3 KB (398 words) - 14:55, 7 January 2009
• Introduction to turbulence/Homogeneous turbulence
  ...generated. If this turbulence is homogeneous and there is no mean velocity gradient to generate new turbulence, the kinetic energy equation reduces to simply: The derivation of this equation begins by taking the gradient of the equation for the fluctuating velocity, then interchanging the order
  10 KB (1,751 words) - 13:03, 21 March 2012
• Introduction to turbulence/Free turbulent shear flows
  ...the gravitational force which is the principal contributor to the pressure gradient. As a consequence the turbulent buoyant plume develops much more quickly th ...th> is <math> U_{0}</math> On the other hand, an estimate for the velocity gradient across the flow of <math> U_{0}/\delta </math> would be much too big, again
  67 KB (11,204 words) - 13:42, 19 April 2016
• Solve UV.f90 - Solution of the momentum equations for U and V
  !----------------------------- pressure gradient ------------------------
  6 KB (932 words) - 14:58, 19 May 2016