Reports

MFIX-Exa provides several options for reporting data from the solver.

Particle size distribution

The particle size distribution (PSD) can be reported for different regions in the model. This feature requires a region already defined in the regions inputs, and only volume regions are valid for PSD reports. Each report must be associated with a single region; combining multiple regions in one report is not supported.

The following inputs are defined using the prefix mfix.reports:

	Description	Type	Default
diameter	Names of the PSD reports	String	None

The following inputs are defined using the prefix mfix.reports.diameter.[report]:

	Description	Type	Default
region	Region to compute the size distribution	String	None
int	Number of time steps between report outputs. Cannot be used with per_approx.	Int	None
per_approx	Simulation time (in seconds) between report outputs. Cannot be used with int.	Real	None
bins	Number of bins in PSD discretization	Int	None
min	Minimum particle size included in discretized PSD	Real	None
max	Maximum particle size included in discretized PSD	Real	None

A sample inputs snippet for outputting the particle size distribution is given below. Two regions are created that span the left and right sides of the domain, and used to create two reports. The left-side report is a PSD consisting of 32 bins between 30-3000 microns that is output every 50 time steps. The right-side report is a PSD consisting of 64 bins between 30-3000 microns that is output every 0.5 seconds of modeled time.

Listing 10 Snippet of inputs for particle size distribution reports.

# Define two regions for collecting report data
# -------------------------------------------------------------
mfix.regions = ... left right

regions.left.lo  = 0.00  0.00  0.00
regions.left.hi  = 0.05  0.10  0.10

regions.right.lo  = 0.05  0.00  0.00
regions.right.hi  = 0.10  0.10  0.10

# Define two particle size distribution reports
# -------------------------------------------------------------
mfix.reports.diameter = left-side  right-side

mfix.reports.diameter.left-side.region  = left

mfix.reports.diameter.left-side.int  =    50
mfix.reports.diameter.left-side.bins =    32
mfix.reports.diameter.left-side.min  =    30.0e-6
mfix.reports.diameter.left-side.max  =  3000.0e-6

mfix.reports.diameter.right-side.region  = right

mfix.reports.diameter.right-side.per_approx =  0.5
mfix.reports.diameter.right-side.bins =       64
mfix.reports.diameter.right-side.min  =       30.0e-6
mfix.reports.diameter.right-side.max  =     3000.0e-6