Granular Media Filtration: Press. Drop Tab

Variable Definitions, Ranges and Default Values

The following table shows a brief description of the variables appearing in this tab. The table also displays their default values and their generally acceptable range:

Variable	Default Value	Range

○ Non-Bed Pressure Drop (kPa) The pressure drop before and after the bed.	5.0	Positive
◙ Bed-Pressure Drop Rate (Pa/cm) The pressure drop in the bed per bed length.	100.0	Positive
◙ Fluid Viscosity (cP) The average viscosity of the fluid in the bed.	1.0	Positive
○ Fair-Hatch Constant A constant of the Fair-Hatch filtration model.	6.0	Positive
● Clean Bed Pressure Drop (kPa) The total pressure drop of the clean bed.	0.0	Positive
○ Power Type Indicates the power type that is used by the operation. Click on the list box to bring up a list of available power types in order to select one.	<Std Power>	Any Power Type
● Power (kW) The total power consumed for the operation (per cycle).	0.0	Positive

Symbol Key: ○ User-specified value (always input); ● Calculated value (always output); ◙ Sometimes input, sometimes output

Specification Choices / Comments

The following list describes the available specification choices in this tab; for more details on how these are implemented, see Granular Media Filtration: Modeling Calculations.

•Bed Pressure Drop Rate Options...

The pressure drop per bed depth (for a clean bed) is either set by the user or calculated using one of the following models: Carmen-Kozeny, Rose, or Fair-Hatch.