Reynolds number
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Fluids and thermal engineering ↗Fluids and thermal engineering calculators
25 calculators. Search or choose one below.
Calculators
Pipe velocity from flow
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Fluids and thermal engineering ↗Darcy-Weisbach pressure loss
Darcy friction factor, not Fanning factor; straight pipe only.
Fluids and thermal engineering ↗Hazen-Williams water loss
Empirical water formula; no nonwater fluids, temperature correction or fire-system compliance.
Fluids and thermal engineering ↗Colebrook friction factor
Fully turbulent Colebrook model; transition/laminar regimes excluded.
Fluids and thermal engineering ↗Minor fitting pressure loss
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Fluids and thermal engineering ↗Pipe equivalent fitting length
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Fluids and thermal engineering ↗Pump hydraulic power
Efficiency meaning must match the requested shaft or electrical boundary.
Fluids and thermal engineering ↗Pump affinity scenario
Ideal affinity scaling, similar efficiency; no guarantee of actual operating point.
Fluids and thermal engineering ↗Net positive suction head available
Reservoir surface velocity neglected.
Fluids and thermal engineering ↗Open channel Manning flow
SI uniform open-channel approximation; user supplies roughness and geometry.
Fluids and thermal engineering ↗Hydraulic diameter
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Fluids and thermal engineering ↗Froude number
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Fluids and thermal engineering ↗Orifice ideal discharge
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Fluids and thermal engineering ↗Tank drain time
Constant-area vented tank, small outlet, no varying coefficient or connected pipe model.
Fluids and thermal engineering ↗Weir discharge estimate
Free, aerated rectangular sharp crest; submergence, end contractions and approach velocity excluded.
Fluids and thermal engineering ↗Nozzle jet velocity
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Fluids and thermal engineering ↗Thermal contact resistance
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Fluids and thermal engineering ↗Layered-wall conduction calculator
Steady one-dimensional conduction, no surface films or bridges.
Fluids and thermal engineering ↗Cylindrical insulation heat flow
Uniform cylinder, no ends or convective surface films.
Fluids and thermal engineering ↗Thermal diffusivity
Calculation uses the entered values and stated mathematical model; quantities must use the labelled units.
Fluids and thermal engineering ↗Biot number
Reports dimensionless value without classifying a design as safe.
Fluids and thermal engineering ↗Log mean temperature difference
Both signed terminal differences must be represented as positive magnitudes; temperature cross not supported.
Fluids and thermal engineering ↗Heat exchanger effectiveness
Measured steady sensible-heat streams, constant heat capacity; no NTU geometry or phase-change model.
Fluids and thermal engineering ↗Psychrometric sensible heat load
Constant humidity ratio and mean specific heats; no latent heat load.
Fluids and thermal engineering ↗No matches. Try a shorter search or another category.