Active

- q - volumetric flow rate
- Fluid flow rate in terms of units of volume per unit of time
- ṁ - mass flow rate
- Fluid flow rate in terms of units of mass per unit of time
- D - pipe diameter
- Internal circular pipe diameter
- V - velocity
- Flow velocity in terms of units of distance per unit of time
- A - area
- Internal pipe cross section area
- ρ - fluid density
- Mass per unit of volume
- T - temperature
- Fluid temperature for gas density calculation based on the ideal gas state equation
- p - pressure
- Fluid pressure at the start of the pipe for gas density calculation based on the ideal gas state equation
- R - gas constant
- Gas constant in terms of energy per unit of mass and temperature, for gas density calculation using ideal gas state equation

- Select value to calculate. You should enter not selected one.
- D
- pipe diameter
- V
- flow velocity

- Select value to input. You should enter selected one. The other one will be calculated
- q
- volumetric flow rate
- ṁ
- mass flow rate

- Select value to input. You should enter selected one. The other one will be calculated. Available only if the gas is selected fluid
- ρ
- fluid density
- T
- temperature

- Select fluid type
- liquid
- for incompressible fluids
- gas
- for fluids where ideal gas state equation is used. Enables selection between density and temperature to input.

- Select pipe shape
- round pipe
- full cross section fluid flow
- rectangle pipe
- for rectangle channels and full cross section flow