RepresentativeMass_iData

(chamberwise) parameter for the RepresentativeMass algorithm (UCV)

RepresentativeMass_iData = ( iTrigger, newPoints, inactiveOrDeletedPoints, nbSmoothingLoops, correctionFactorPerSmoothingLoop, ... iMethodSmooth, whichVi, iMethodRepDens, startAtTimeCycle, ... Wfactor, VWexponent, Kfactor, KWexponent, Mexponent , ... deletion_weightInflowOutflow, deletion_weightOtherBND , ... $eqnForFitering$, ... lowerSoftBound, upperSoftBound, UpperHardLimit )

Default: off

RepresentativeMass_iData = ( 0, 1, 1, 1, 10, 1, 1, 1, 2, 2, 0, 2, 0, 1, 1000, 100, 0 )

RepresentativeMass_iData = 1 is equivalent to

RepresentativeMass_iData = ( 1 , 1, 1, 1, 10, 3, 1, 1, 2, 2, 0, 2, 0, 1, 1000, 100, 0 )

and switches the algorithm on without changing the default values of the other parameters. RepresentativeMass_iData switches on the distribution of the representative masses within the points in the fluid domain. The strength of the correction itself is controlled by the two parameters VOLUME_correction_FreeSurface or VOLUME_correction_local. One or both of these parameters must additionally be set in order to activate the Volume Correction algorithm. Note: This parameter can also be set chamberwise for multiphase simulations (see also KindOfProblem, CHAMBER). If it is not set for specific chambers, it is automatically set according to the non-chamberwise definition for all chambers.

entry	description
iTrigger	global switch for representative mass algorithm
	off: 0 (default), on: 1, see RepresentativeMassAlgorithm
newPoints	number of loops to provide representative mass packages from existing points to new points
	Default: 1
inactiveOrDeletedPoints	for development/debugging, KEEP AT 1
nbSmoothingLoops	number of iteration loops per time cycle of the Smoothing algorithm
correctionFactorPerSmoothingLoop	multiply the mass change in Smoothing by a reducing factor (in percent!!!)
	$ \Delta \overset{\scriptscriptstyle\frown}{m}_{i}=\alpha \left( \sum\limits_{j}{\Delta \overset{\scriptscriptstyle\frown}{m}_{ij}-\Delta \overset{\scriptscriptstyle\frown}{m}_{ji}} \right)$
iMethodSmooth	method for Smoothing algorithm
	choose 1, 2, or 3.
	Recent true applications show, that most efficient smoothing is achieved with method 3. The other methods might provoke strange behavior.
whichVi	for development/debugging, KEEP AT 1
iMethodRepDens	method how to compute the representative density, see DefinitionRepresentativeDensity
startAtTimeCycle	start the representative mass analysis at this time cycle
Wfactor	value of $ \alpha_W$, see DefinitionRepresentativeDensity
VWexponent	value of $ \beta_W$, see DefinitionRepresentativeDensity
Kfactor	value of $ \alpha_K$, see Smoothing
KWexponent	value of $ \beta_K$, see Smoothing
Mexponent	for development/debugging, KEEP AT 1
deletion_weightInflowOutflow	redistribution of repMass of deleted/deactivated points: additional weight factor for inflow and outflow points (in percent!!!)
deletion_weightOtherBND	redistribution of repMass of deleted/deactivated points: additional weight factor for other boundary points except inflow and outflow (in percent!!!)
$eqnForFitering$	equation number for the filter that defines, what points are allowed to carry a representative mass.
	Default: 0, other values have to be implemented in USER_common_variables
lowerSoftBound	in percent! , (default=50), it represents the parameter $ \alpha_{min}$ in Smoothing
upperSoftBound	in percent! , (default=200, it represents the parameter $ \alpha_{max}$ in Smoothing
UpperHardLimit	in percent! , (default=333), it represents the parameter $ \alpha_{hard}$ in Repair

Example: implementation of a filter in USER_common_variables

begin_equation{$myFilter$} #if the functional is positive, the point is allowed to carry representative mass if ( Y%ind_kob%=%BND_slip% ) :: -1 # points on %BND_slip% will not carry RepMass else :: 1 # all other points regularly carry RepMass endif end_equation RepresentativeMass_iData = ( ..., $myFilter$ ) # put the filter equation at the 17th position

Note

The algorithm is described in RepresentativeMassAlgorithm.
Using this volume correction will overwrite any setting for the global volume correction by VOLUME_correction.

This item is referenced in:
RainOnSimplePlate	Simple Rain Source
%ind_BNDfree_defect%	defect displacement of free surface with regards to the representative mass, clusterwise
%ind_mi_rep%	representative mass of the point
DEBUG_GeneralParameter	General list of debug parameters at the developers disposal
RepresentativeMass_iData	(chamberwise) parameter for the RepresentativeMass algorithm (CV)
RepresentativeMass_iData	(chamberwise) parameter for the RepresentativeMass algorithm (UCVO)
COMP_DoOrganizeOnlyAfterHowManyCycles	do the point cloud organization only after how many time cycles (UCV)
RepresentativeMass_iData	(chamberwise) parameter for the RepresentativeMass algorithm (UCV)
VOLUME_correction	(chamberwise) parameter to correct volume by GLOBALLY adjusting the divergence of velocity term (UCV)
VOLUME_correction_local	(chamberwise) parameter to correct volume by LOCALLY adjusting the divergence of velocity term due to representative mass balance (UCV)
Stable	Release notes for the MESHFREE stable executables
Beta	Latest release notes for the MESHFREE beta executables
All	Complete release notes for the MESHFREE beta executables
VolumeCorrection	Volume Correction Algorithms in MESHFREE
RepresentativeMassAlgorithm	How to distribute representative masses to MESHFREE points
ExperimentalVersions	smooth the representative masses in order to obtain smooth representative density
Repair	fix negative of too small representative masses, obey upper hard limit as well
DefinitionRepresentativeDensity	define the representative density