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• 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
• Solve Pressure Correction.f90 - Solution of pressure-correction equation and correction of U,V and P
  ! this is the gradient of pressure at east location usint central difference
  6 KB (872 words) - 15:03, 19 May 2016
• Introduction to turbulence/Wall bounded turbulent flows
  ...ndtl’s boundary layer, and the length scale characterizing the necessary gradient in velocity became known as the boundary layer “thickness”. ...eam pressure gradient. Hence, for very large Reynolds number, the pressure gradient across the boundary layer equation is very small. Thus the pressure ''in th
  41 KB (7,002 words) - 13:02, 21 March 2012
• Code: Lid driven cavity using pressure free velocity form
  ...ltz Theorem. Further, to determine fluid flow in the absence of a pressure gradient, one can specify the difference of stream function values across a 2D chann ... These elements have derivatives as components of the gradient. In 2D, the gradient and curl of a scalar are clearly orthogonal, given by the expressions,
  11 KB (1,560 words) - 20:12, 15 March 2013
• Code: Lid-driven cavity using pressure-free velocity form (2)
  ...ltz Theorem. Further, to determine fluid flow in the absence of a pressure gradient, one can specify the difference of stream function values across a 2D chann ... These elements have derivatives as components of the gradient. In 2D, the gradient and curl of a scalar are clearly orthogonal, given by the expressions,
  12 KB (1,673 words) - 20:07, 15 March 2013
• PFV4 get pressure
  % Simple cubic gradient element "mass" matrix for m=1:npn % Loop over corner nodes, GBL is gradient of bilinear fn
  11 KB (1,613 words) - 19:29, 15 March 2013
• PFV diffusion matrix 2
  % Transposed gradient (derivatives) of scalar bilinear mapping function.
  5 KB (766 words) - 18:32, 4 July 2011
• PFV convection matrix 2
  % Transposed gradient (derivatives) of scalar bilinear mapping function for straight-sised elemen
  7 KB (1,099 words) - 18:38, 4 July 2011
• PFV get pressure
  % Simple cubic gradient element "mass" matrix for m=1:npn % Loop over corner nodes, GBL is gradient of bilinear fn
  11 KB (1,623 words) - 16:10, 15 March 2013
• PFV get pressure 2
  % Simple cubic gradient element "mass" matrix J=(Xe*GBL(nn(:,:),nn(m,1),nn(m,2)))'; % GBL is gradient of bilinear function
  19 KB (3,020 words) - 18:42, 4 July 2011
• Code: Thermal cavity using pressure-free velocity form
  ...ltz Theorem. Further, to determine fluid flow in the absence of a pressure gradient, one can specify the difference of stream function values across a 2D chann ... These elements have derivatives as components of the gradient. In 2D, the gradient and curl of a scalar are clearly orthogonal, given by the expressions,
  14 KB (1,998 words) - 21:21, 15 March 2013