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 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 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. 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
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |