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Fluid Properties Blogs

Here you will find informational articles on topics related to the Excel spreadsheets for civil and mechanical engineering calculations available from the DOWNLOADS page.  This includes articles in the clickable categories below: pipe flow calculations, open channel flow, heat transfer/heat exchangers, storm water/hydrology, continuous beam analysis and design, open channel flow measurement, and pipe flow measurement topics.  Scroll down on each category page to see all of the articles.

Similar blog articles are available at our companion site, www.EngineeringExcelSpreadsheets.com.

Pipe Flow CalculationsOpen Channel FlowHeat Transfer/Heat ExchangersStorm Water/HydrologyCurrentWastewater TreatmentOpen Channel Flow MeasurementStructural Analysis and Design of BeamsPipe Flow MeasurementEngineering EconomicsFluid PropertiesSurveying

Sutherland Law Viscosity Calculator

Posted on Thursday, October 29, 2015 at 11:05 PM

 

Where to Find a Sutherland Law Viscosity Calculator Excel Spreadsheet

To obtain a Sutherland law viscosity calculator Excel spreadsheet, click here to visit our spreadsheet store.  Look in the Fluid Properties category on the Download page.  This Excel spreadsheet is intended to calculate gas viscosity at a specified temperature using Sutherland's formula.  You can buy a convenient Sutherland law viscosity calculator Excel spreadsheet  for a very reasonable price.  This spreadsheet calculates a gas viscosity based on a reference temperature and reference viscosity..  Calculations may be made in either U.S. or S.I. units.  Read on for information about using a Sutherland law viscosity calculator Excel spreadsheet.

Background for Sutherland Law Viscosity Calculator Excel Spreadsheet

Sutherland's formula for calculating the viscosity of a gas at a specified gas temperature is shown below along with an explanation of the parameters in the equation.

Sutherland Formula for Gas Viscosity CalculationThe parameters in Sutherland's formula are as follows:

To = reference temperature, K

μo = viscosity of the gas at temperature, To

C = Sutherland's constant for the gas, K

T = the temperature of the gas, K

μ = the viscosity of the gas at temperature, T, in the same units as μo.

Example Sutherland Law Viscosity Calculator Excel Spreadsheet

An example Sutherland law viscosity calculator Excel spreadsheet is partially shown in the image below.  This Excel spreadsheet can be used to calculate the viscosity of a specified gas at a specified tempeerature.  This Excel spreadsheet, as well as others for fluid property calculations, is available for both U.S. or S.I. units for a very reasonable price in our spreadsheet store.

Sutherland Formula Viscosity Calculator SpreadsheetReferences

  1. Chapman, S. & Cowling, T. G., "The Mathematical Theory of Non-Uniform Gases, 3rd Ed, 1970, Cambridge Mathematical Library.
  2. National Physical Laboratory, Kaye & Laby, Tables of Physical and Chemical Constants, Chapter 2, Section 2.2, Subsection 2.2.3.
  3. Bengtson, Harlan, Sutherland Formula Viscosity Calculator, an informational online blog article
  4. Bengtson, Harlan H., "Gas Property Calculator Spreadsheet," an Amazon Kindle e-book.

Air Viscosity Calculator Pressure Temperature Spreadsheet

Posted on Sunday, February 3, 2013 at 5:56 PM

Where to Find an Air Viscosity Calculator Pressure Temperature Spreadsheet

To obtain an Air Viscosity Calculator Pressure Temperature excel spreadsheet, click here for the download page.  Why use online calculators or tables to find the viscosity of air at a specified pressure and temperature when you can buy a convenient air viscosity calculator pressure temperature excel spreadsheet for only $4.95?  This spreadsheet will calculate the viscosity of air at specified pressure and temperature in either U.S. or S.I. units.  Read on for information about Excel spreadsheets that can be used as an Air viscosity calculator for specified pressure and temperature.

Air Viscosity Calculator Pressure Temperature Spreadsheet Applications

An  Air Viscosity calculator pressure temperature excel spreadsheet  can be used for any situation where a value of air viscosity is needed at a specified pressure and temperature.  This could include calculations for air flow in a pipe, drag force or drag coefficient calculations for flow of an object through air, and any other calculation requiring the Reynolds number for air flow or flow through air.  For example, see the related article, Fanno Flow Excel Spreadsheet for Air Flow in a Pipe.

Equations for an Air Viscosity Calculator Pressure Temperature Spreadsheet

Equations are available for an air viscosity temperature calculator to calculate the viscosity of air at specified temperature and pressure.  The spreadsheet shown in  the diagram below calculates air density using an equation for air viscosity as a function of temperature ratio, Tr , and density ratio, ρr  , where in U.S. units:  Tr   =  T/238.5 with T in degrees R  and ρr    =  ρ/0.6096 with ρ in slugs/ft3.  Since the air density is needed for this calculation, the spreadsheet also calculates the density of air at the specified air temperature and pressure.  The complete equations are included in the spreadsheet discussed above and shown in the screenshot below.

Example Air Viscosity Calculator Pressure Temperature Excel Spreadsheet

The Air Viscosity calculator pressure temperature excel spreadsheet shown in the image below can be used to calculate the viscosity of air at given temperature and pressure as discussed above.  This Excel spreadsheet and others for fluid properties calculations, in either U.S. or S.I. units are available for very reasonable prices on our download page.

Air Viscosity Calculator Pressure Temperature Spreadsheet

  

Reference

Bengtson, Harlan H.,  "Air Viscosity Temperature Calculator Spreadsheet,"  An online informational blog article

 

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