Title and Link to Calc:

Incompressible Fluid Flow : Flow in Orifices : IFF-CRFOF-0012

Description:

Calculates Flow in a orifice similar to Example 4-23 in Flow of Fluids Through Valves, Fittings, and Pipe, 1988 (reprinted 12/01), Crane Co.

Alternative Descriptors:

Liquid flow in orifices, Discharge from orificies

Calc Number:

IFF-CRFOF-0012

Calc Status:

Beta

Reference:

(1) Flow of Fluids Through Valves, Fittings, and Pipe, 1988 (reprinted 12/01), Crane Co.

Reference Example(s) Modeled/Generalized:

Example 4-23 of the above reference

Calc Origination Date:

02/27/2006

Calc Originator:

RBC

Calc Revision History:

Calc Guidelines:

See the above reference

Access:

Activating this calc requires entry of the correct access code. Contact eng-calc@eng-calcs.com

Variables:

Variable Description - Description of the variable
Variable Label Description - The description of the variable as it appears in the calc.
Variable Calc Name - The calc internal variable name
Variable Units - The units for the variable
Variable Calc Upper Limit - The highest allowed value in the calc.
Variable Calc Lower Limit - The lowest allowed value in the calc.
Variable Type - Either "Output" or "Input"
Variable Format - Real Number, Text, or Integer
Variable Notes - Other comments about the variable

Variable Description: Mass flow rate from the orifice
Variable Label Description: Orifice Discharge Rate
Variable Calc Name: WRLM
Variable Units: LB/SEC
Variable Calc Upper Limit: 10000
Variable Calc Lower Limit: 0
Variable Type: Output
Variable Format: REAL
Variable Notes:

Variable Description: Orifice Flow Coefficient
Variable Label Description: Orifice Flow Coefficient
Variable Calc Name: CV
Variable Units:
Variable Calc Upper Limit: 1.3
Variable Calc Lower Limit: 0.5
Variable Type: Output
Variable Format: REAL
Variable Notes:

Variable Description: Reynolds Number upstream of orifice (large diameter Reynolds number)
Variable Label Description: Reynolds Number at Inlet
Variable Calc Name: REY
Variable Units:
Variable Calc Upper Limit: 100000000
Variable Calc Lower Limit: 4000
Variable Type: Output
Variable Format: REAL
Variable Notes:

Variable Description: Comments
Variable Label Description: Comments
Variable Calc Name: COM
Variable Units:
Variable Calc Upper Limit:
Variable Calc Lower Limit:
Variable Type: Output
Variable Format: TEXT
Variable Notes: Displays "Input(s) out of range." if an entered input variable(s) are out of range. Displays "Output(s) out of range." if an output variable exceeds its range. The "out of range" variable(s) are displayed in yellow. The limited range values are used in the calculation, not the "out of range" value(s).

Variable Description: Upstream (Large) Pipe (inside) Diameter at Entrance of Orifice
Variable Label Description: Pipe Upstream Inside Diameter
Variable Calc Name: PID
Variable Units: IN
Variable Calc Upper Limit: 24
Variable Calc Lower Limit: 0.01
Variable Type: Input
Variable Format: REAL
Variable Notes:

Variable Description: Viscosity of Fluid at Entrance of orifice (centipoise)
Variable Label Description: Upstream Viscosity
Variable Calc Name: VISC
Variable Units: CP
Variable Calc Upper Limit: 1000
Variable Calc Lower Limit: 0.001
Variable Type: Input
Variable Format: REAL
Variable Notes:

Variable Description: Beta (Ratio of small to large inside diameters) of orifice to pipe (inside) diameter
Variable Label Description: Orifice Beta
Variable Calc Name: BVAL
Variable Units:
Variable Calc Upper Limit: 0.9
Variable Calc Lower Limit: 0.05
Variable Type: Input
Variable Format: REAL
Variable Notes:

Variable Description: Fluid Density in pounds per cubic foot at upstream conditions
Variable Label Description: Fluid Density
Variable Calc Name: DEN
Variable Units: LBM/CUFT
Variable Calc Upper Limit: 10000
Variable Calc Lower Limit: 0.01
Variable Type: Input
Variable Format: REAL
Variable Notes:

Variable Description: Orifice Differential Pressure, measured between one pipe diameter upstream of orifice inlet face and one half pipe diameter downstream of orifice inlet face
Variable Label Description: Differential Pressure
Variable Calc Name: DIF
Variable Units: PSIA
Variable Calc Upper Limit: 10000
Variable Calc Lower Limit: 0.001
Variable Type: Input
Variable Format: REAL
Variable Notes:

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