- Feb 22, 2016
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Henry Weller authored
Contribution provided by Bruno Santos Resolves feature request http://www.openfoam.org/mantisbt/view.php?id=2004
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Henry Weller authored
This change requires that the de-reference operator '()' returns a const-reference to the object stored irrespective of the const-ness of object stored and the new member function 'ref()' is provided to return an non-const reference to stored object which throws a fatal error if the stored object is const. In order to smooth the transition to this new safer 'tmp' the now deprecated and unsafe non-const de-reference operator '()' is still provided by default but may be switched-off with the compilation switch 'CONST_TMP'. The main OpenFOAM library has already been upgraded and '-DCONST_TMP' option specified in the 'options' file to switch to the new 'tmp' behavior. The rest of OpenFOAM-dev will be upgraded over the following few weeks. Henry G. Weller CFD Direct
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- Feb 20, 2016
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Henry Weller authored
To be used instead of zeroGradientFvPatchField for temporary fields for which zero-gradient extrapolation is use to evaluate the boundary field but avoiding fields derived from temporary field using field algebra inheriting the zeroGradient boundary condition by the reuse of the temporary field storage. zeroGradientFvPatchField should not be used as the default patch field for any temporary fields and should be avoided for non-temporary fields except where it is clearly appropriate; extrapolatedCalculatedFvPatchField and calculatedFvPatchField are generally more suitable defaults depending on the manner in which the boundary values are specified or evaluated. The entire OpenFOAM-dev code-base has been updated following the above recommendations. Henry G. Weller CFD Direct
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- Feb 17, 2016
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Henry Weller authored
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Henry Weller authored
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Henry Weller authored
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- Feb 15, 2016
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Henry Weller authored
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Henry Weller authored
Vastly reduces the scattering and churning behaviour of packed beds. Development provided by Will Bainbridge <github.com/will-bainbridge> See also http://www.openfoam.org/mantisbt/view.php?id=1994
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Henry Weller authored
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Henry Weller authored
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- Feb 14, 2016
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Henry Weller authored
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1995
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- Feb 13, 2016
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Henry Weller authored
The boundary conditions of HbyA are now constrained by the new "constrainHbyA" function which applies the velocity boundary values for patches for which the velocity cannot be modified by assignment and pressure extrapolation is not specified via the new "fixedFluxExtrapolatedPressureFvPatchScalarField". The new function "constrainPressure" sets the pressure gradient appropriately for "fixedFluxPressureFvPatchScalarField" and "fixedFluxExtrapolatedPressureFvPatchScalarField" boundary conditions to ensure the evaluated flux corresponds to the known velocity values at the boundary. The "fixedFluxPressureFvPatchScalarField" boundary condition operates exactly as before, ensuring the correct flux at fixed-flux boundaries by compensating for the body forces (gravity in particular) with the pressure gradient. The new "fixedFluxExtrapolatedPressureFvPatchScalarField" boundary condition may be used for cases with or without body-forces to set the pressure gradient to compensate not only for the body-force but also the extrapolated "HbyA" which provides a second-order boundary condition for pressure. This is useful for a range a problems including impinging flow, extrapolated inlet conditions with body-forces or for highly viscous flows, pressure-induced separation etc. To test this boundary condition at walls in the motorBike tutorial case set lowerWall { type fixedFluxExtrapolatedPressure; } motorBikeGroup { type fixedFluxExtrapolatedPressure; } Currently the new extrapolated pressure boundary condition is supported for all incompressible and sub-sonic compressible solvers except those providing implicit and tensorial porosity support. The approach will be extended to cover these solvers and options in the future. Note: the extrapolated pressure boundary condition is experimental and requires further testing to assess the range of applicability, stability, accuracy etc. Henry G. Weller CFD Direct Ltd.
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- Feb 12, 2016
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Henry Weller authored
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Henry Weller authored
which returns true if the fvPatchField type provides an assignment operator
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Henry Weller authored
valuePointPatchField: Change assignment to use the object's internalField rather than that of the argument Avoids dependency on the state of the argument pointPatchField the internalField of which may have been de-allocated
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Henry Weller authored
which supports re-using the internalField storage
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Henry Weller authored
This is a convenient method to set a null-constructed tmp in a conditional statement.
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- Feb 10, 2016
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Henry Weller authored
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Henry Weller authored
Resolved bug-report http://www.openfoam.org/mantisbt/view.php?id=1990
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Henry Weller authored
with optional specification of the mark/space ratio Templated square-wave function with support for an offset level. \f[ a square(f (t - t_0)) s + l \f] where \f$ square(t) \f$ is the square-wave function in range \f$ [-1, 1] \f$ with a mark/space ratio of \f$ r \f$ \vartable symbol | Description | Data type | Default a | Amplitude | Function1<scalar> | f | Frequency [1/s] | Function1<scalar> | s | Type scale factor | Function1<Type> | l | Type offset level | Function1<Type> | t_0 | Start time [s] | scalar | 0 r | mark/space ratio | scalar | 1 t | Time [s] | scalar \endvartable Example for a scalar: \verbatim <entryName> square; <entryName>Coeffs { frequency 10; amplitude 0.1; scale 2e-6; level 2e-6; } \endverbatim
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Henry Weller authored
to support time-variation
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Henry Weller authored
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Henry Weller authored
to support time-variation
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Henry Weller authored
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Henry Weller authored
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Henry Weller authored
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- Feb 09, 2016
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Henry Weller authored
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Henry Weller authored
noSlip is equivalent to fixedValue with a value of (0 0 0) but is simpler to specify e.g. upperWall { type noSlip; }
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Henry Weller authored
movingWallVelocityFvPatchVectorField: Updated to obtain the velocity field from the dimensionedInteralField rather than by "lookup" from the database.
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Henry Weller authored
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Henry Weller authored
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Henry Weller authored
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Henry Weller authored
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Henry Weller authored
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Henry Weller authored
For example the sinusoidal motion of the floating object in the potentialFreeSurfaceFoam/oscillatingBox tutorial is now specified thus floatingObject { type fixedNormalInletOutletVelocity; fixTangentialInflow false; normalVelocity { type uniformFixedValue; uniformValue sine; uniformValueCoeffs { frequency 1; amplitude table ( ( 0 0) ( 10 0.025) (1000 0.025) ); scale (0 1 0); level (0 0 0); } } value uniform (0 0 0); } rather than using floatingObject { type fixedNormalInletOutletVelocity; fixTangentialInflow false; normalVelocity { type oscillatingFixedValue; refValue uniform (0 1 0); offset (0 -1 0); amplitude table ( ( 0 0) ( 10 0.025) (1000 0.025) ); frequency constant 1; } value uniform (0 0 0); }
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- Feb 08, 2016
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Henry Weller authored
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Henry Weller authored
Templated sine function with support for an offset level. \f[ a sin(2 \pi f (t - t_0)) s + l \f] where \vartable symbol | Description | Data type a | Amplitude | Function1<scalar> f | Frequency [1/s] | Function1<scalar> s | Type scale factor | Function1<Type> l | Type offset level | Function1<Type> t_0 | Start time [s] | scalar t | Time [s] | scalar \endvartable
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Henry Weller authored
Function1 is an abstract base-class of run-time selectable unary functions which may be composed of other Function1's allowing the user to specify complex functions of a single scalar variable, e.g. time. The implementations need not be a simple or continuous functions; interpolated tables and polynomials are also supported. In fact form of mapping between a single scalar input and a single primitive type output is supportable. The primary application of Function1 is in time-varying boundary conditions, it also used for other functions of time, e.g. injected mass is spray simulations but is not limited to functions of time.
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Henry Weller authored
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Henry Weller authored
Description Templated sine function with support for an offset level. \f[ a sin(2 \pi f (t - t_0)) s + l \f] where \vartable a | Amplitude f | Frequency [1/s] s | Type scale factor l | Type offset level t_0 | Start time [s] t | Time [s] \endvartable Example for a scalar: \verbatim <entryName> sine; <entryName>Coeffs { frequency 10; amplitude 0.1; scale 2e-6; level 2e-6; } \endverbatim Example for a vector: \verbatim <entryName> sine; <entryName>Coeffs { frequency 10; amplitude 1; scale (1 0.1 0); level (10 1 0); } \endverbatim
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