1Lecture 5 - Solution MethodsApplied Computational Fluid Dynamics ,
Instructor: André Bakker
http://www.bakker.org/dartmouth06/engs150/05-solv.pdf
From the OpenFoam user manual:
rhoSimpleFoam Steady-state solver for turbulent flow of compressible fluids.
rhoPimpleFoam of compressible fluids for HVAC and similar applications, with optional
mesh motion and mesh topology changes.
potentialFoam Potential flow solver which solves for the velocity potential, to calculate the
flux-field, from which the velocity field is obtained by reconstructing the flux.
simpleFoam Steady-state solver for incompressible, turbulent flow, using the SIMPLE algo-
rithm.
pisoFoam Transient solver for incompressible, turbulent flow, using the PISO algorithm.
icoFoam Transient solver for incompressible, laminar flow of Newtonian fluids.
===================================================
5.2.3.2
Entrainment boundary conditions
The combination of the totalPressure condition on pressure and pressureInletOutletVelocity
on velocity is extremely common for patches where some inflow occurs and the inlet flow
velocity is not known. That includes the atmosphere boundary in the damBreak tutorial,
inlet conditions where only pressure is known, outlets where flow reversal may occur, and
where flow in entrained, e.g. on boundaries surrounding a jet through a nozzle.
The totalPressure condition specifies
(
p 0
for outflow
p =
(5.2)
p 0 − 12 |U 2 | for inflow (incompressible, subsonic)
where the user specifies p 0 through the p0 keyword. The pressureInletOutletVelocity condition
specifies zeroGradient at all times, except on the tangential component which is set to fixed-
Value for inflow, with the tangentialVelocity defaulting to 0.
Source: http://foam.sourceforge.net/docs/Guides-a4/OpenFOAMUserGuide-A4.pdf
Compare to:
https://www.afs.enea.it/project/neptunius/docs/fluent/html/ug/node244.htm
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https://www.openfoam.com/documentation/user-guide/standard-boundaryconditions.php
pressureDirectedInletOutletVelocity
|
This velocity inlet/outlet boundary condition is applied
to pressure boundaries where the pressure is specified. A
zero-gradient condtion is applied for outflow (as defined by
the flux); for inflow, the velocity is obtained from the flux
with the specified inlet direction
|
pressureDirectedInletVelocity
|
This velocity inlet boundary condition is applied to patches
where the pressure is specified. The inflow velocity is obtained
from the flux with the specified inlet direction” direction
|
pressureInletOutletParSlipVelocity
|
This velocity inlet/outlet boundary condition for pressure
boundary where the pressure is specified. A zero-gradient is
applied for outflow (as defined by the flux); for inflow, the
velocity is obtained from the flux with the specified inlet
direction
|
pressureInletOutletVelocity
|
This velocity inlet/outlet boundary condition is applied
to pressure boundaries where the pressure is specified. A
zero-gradient condition is applied for outflow (as defined
by the flux); for inflow, the velocity is obtained from the
patch-face normal component of the internal-cell value
|
pressureInletUniformVelocity
|
This velocity inlet boundary condition is applied to patches
where the pressure is specified. The uniform inflow velocity
is obtained by averaging the flux over the patch, and then
applying it in the direction normal to the patch faces
|
pressureInletVelocity
|
This velocity inlet boundary condition is applied to patches
where the pressure is specified. The inflow velocity is obtained
from the flux with a direction normal to the patch faces
|
pressureNormalInletOutletVelocity
|
This velocity inlet/outlet boundary condition is applied to
patches where the pressure is specified. A zero-gradient
condition is applied for outflow (as defined by the flux); for
inflow, the velocity is obtained from the flux with a direction
normal to the patch faces
|
pressurePIDControlInletVelocity
|
This boundary condition tries to generate an inlet velocity
that maintains a specified pressure drop between two face
zones downstream. The zones should fully span a duct through
which all the inlet flow passes
https://cfd.direct/openfoam/user-guide/v6-turbulence/ |
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