Chemical engineering literature does not fully cover other essential aspects of pump sizing and selection - including the viscosity correction, power consumption, commercial availability and lifecycle cost analysis. A number of recent articles provide useful guidelines for sizing and selecting pumps, but these articles focus on certain specific aspects of proper pump sizing, while leaving out others. Many aspiring chemical engineers enter industry after university study without sufficient practical knowledge about how to properly size pumps. An automated spreadsheet method helps engineers take those factors into account in centrifugal pump selection 1 in 2/s = 0.0069444 ft 2/s = 25 ft 2/h = 0.00064516 m 2/s = 2.Viscosity, power consumption, commercial availability and lifecycle cost analysis are all important considerations in pump sizing.1 Pa s = 1 kg/(m s) = 1 (N s)/m 2 = 10 P = 1000 cP = 0.672197 lb/(ft s) = 2419.08 lb/(ft h) = 0.00014504 reynĬentistoke = square millimeter/second, square foot/hour, square foot/second, square inch/second, square meter/hour, square meter/second, stoke = square centimeter/second.Kinematic viscosity of methane at gas-liquid equilibrium pressure:ĭynamic (absolute) and kinematic viscosity of methane at given temperatures and pressures, SI and Imperial units:įor full table with Dynamic and Kinematic Viscosity- rotate the screen! StateĪbsolute or Dynamic Viscosity Unit ConverterĬentipoise, gram/(centimeter second) = poise, kilogram/meter second =newton second/square meter = pascal second, pound/(foot hour) , pound/(foot second), reyn Methane dynamic and kinematic viscosity at atmospheric pressure and varying temperature:ĭynamic viscosity of methane at varying temperature and 1, 10 and 100 bara (14.5, 1 psia):ĭynamic viscosity of methane at gas-liquid equilibrium pressure: See also other properties of Methane at varying temperature and pressure: Density and specific weight, Prandtl number, Specific heat (heat capacity), Thermal conductivity, and Thermophysical properties at standard conditions,Īs well as dynamic and kinematic viscosity of air, ammonia, benzene, butane, carbon dioxide, ethane, ethanol, ethylene, methanol, nitrogen, oxygen, propane and water. Temperature Choose the actual unit of temperature: While the kinematic viscosity is given as cSt, m 2/s, and ft 2/s The output dynamic viscosity is given as Pa*s, N*s/m 2, cP, mPa*s, lb f*s/ft 2 and lb m/(ft*h), The calculator below can be used to calculate methane dynamic or kinematic viscosity at given temperatures and atmospheric pressure. Tabulated values and viscosity units conversion are given below the figures. Absolute or dynamic viscosity is used to calculate Reynold's Number to determine if a fluid flow is laminar, transient or turbulent. The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.įor further definitions, go to Absolute (dynamic) and kinematic viscosity.
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