• Fluid properties
• Fluid density
• Specific volume
• Specific gravity
• Mixture density
• Viscosity
• Pressure levels

• Flow in pipes
• Pipe diameter
• Laminar/turbulent
• Reynolds number
• Bernoulli principle
• Darcy formula
• Friction
• Dynamic/total pressure
• Heat power

• Flow in valves and fittings
• Resistance coefficient
• Flow coefficient
• Cavitation
• Chocked flow
• Flow discharge
• Gas regulator capacity
• Natural gas control valve

• Compressible gas flow
• Compressible flow
• Isothermal flow
• Fuel combustion
• Maximum flow
• Steam evaporation