![]() Oxygen - Dynamic and Kinematic Viscosity vs. ![]() Online calculator, figures and tables showing dynamic and kinematic viscosity of liquid methanol,CH 3OH, at varying temperature - Imperial and SI Units.Ĭalculate fluid flow friction coefficients from a Moody diagram. Methanol - Dynamic and Kinematic Viscosity vs. Kinematic viscosities of some common liquids like motor oil, diesel fuel, peanut oil and many more. Heat transfer, pressure and head loss in a fluid varies with laminar, transitional or turbulent flow. The entrance length is the length in a tube or duct after an obstruction - until the flow velocity profile is fully developed.Ĭalculate hydraulic diameter for pipes and ducts.Ĭalculate friction coefficients for laminar fluid flow. Online calculator, figures and tables showing dynamic and kinematic viscosity of ethylene, C 2H 4, also called ethene or acetene, at varying temperature and pressure - Imperial and SI Units.įluid Flow - Entrance Length and Developed Flow Head LossĬalculate pressure loss - or head loss - in ducts, pipes or tubes.Įthylene - Dynamic and Kinematic Viscosity vs. Physical and chemical dimensionless quantities - Reynolds number, Euler, Nusselt, and Prandtl number - and many more.Įnergy Equation - Pressure Loss vs. The Darcy-Weisbach equation can be used to calculate the major pressure and head loss due to friction in ducts, pipes or tubes. Online calculators, figures and tables with dynamic and kinematic viscosity of liquid and gaseous butane, C 4H 10, at varying temperarure and pressure, SI and Imperial units.įriction loss coefficients in pipes, tubes and ducts.ĭarcy-Weisbach Equation - Major Pressure and Head Loss due to Friction Hot and cold water service systems - design properties, capacities, sizing and more.īutane - Dynamic and Kinematic Viscosity vs. Involving velocity, pressure, density and temperature as functions of space and time.ĭimensions of pipes and tubes, materials and capacities, pressure drop calculations and charts, insulation and heat loss diagrams. Pipe lines - fluid flow and pressure loss - water, sewer, steel pipes, pvc pipes, copper tubes and more. Hydraulic diameter - d h - (or c haracteristic length - L) (m, ft)Ībsolute (dynamic) viscosity - μ - (Ns/m 2, lb m/s ft) The calculator is generic and can be used for metric and imperial units as long as the use of units are consistent. The calculator is valid for incompressible flow - flow with fluids or gases without compression - as typical for air flows in HVAC systems or similar. This calculator can be used if density and absolute (dynamic) viscosity of the fluid is known. Online Reynolds Calculator Density and absolute (dynamic) viscosity is Known free apps for offline use on mobile devices. Reynolds Number can then be calculated using equation (1) like Example - Calculate Reynolds NumberĪ Newtonian fluid with a dynamic or absolute viscosity of 0.38 Ns/m 2 and a specific gravity of 0.91 flows through a 25 mm diameter pipe with a velocity of 2.6 m/s.ĭensity can be calculated from the specific gravity of the fluid and the density of the specific gravity reference water 1000 kg/m 3 - as In practice laminar flow is only actual for viscous fluids - like crude oil, fuel oil and other oils. The Reynolds Number can be used to determine if flow is laminar, transient or turbulent. Ν = kinematic viscosity (cSt) (1 cSt = 10 -6 m 2/s ) The Reynolds number for a pipe or duct expressed in Imperial units The Reynolds Number for the flow in a duct or pipe can with the hydraulic diameter be expressed asĭ h = hydraulic diameter (m, ft) Reynolds Number for a Pipe or Duct in Imperial Units ![]() Ν = μ / ρ = kinematic viscosity (m 2/s, ft 2/s) Reynolds Number for Flow in Pipe or Ductįor a pipe or duct the characteristic length is the hydraulic diameter. Μ = dynamic viscosity (Ns/m 2, lb m/s ft) U = velocity based on the actual cross section area of the duct or pipe (m/s, ft/s) Reynolds Number can therefore be expressed as
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