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help! air viscosity versus pressure

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Old   August 30, 2005, 15:19
Default help! air viscosity versus pressure
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lin
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Does anybody know the relationship between the air's viscosity and the pressure?(0.1 to 10000 times of the atmosphere pressure).Thanks a lot!!
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Old   July 26, 2006, 05:00
Default Re: help! air viscosity versus pressure
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Isra bani hani
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Does anybody know the relationship between the air's viscosity and the pressure?(0.1 to 10000 times of the atmosphere pressure).Thanks a lot!!

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Old   December 7, 2006, 20:20
Default Re: help! air viscosity versus pressure
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ginger
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It's basically a measure of temperature. ten thousand atmospheres, gas will not be acting ideal at those temperatures, actually forget this, when you figure it out would you email me till then ther's an interesting viscosity calculator on the internet.
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Old   July 17, 2007, 02:13
Default Re: help! air viscosity versus pressure
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alirez
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please send to me the air viscosity vs temprature table
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Old   August 30, 2007, 20:02
Default Re: help! air viscosity versus pressure
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Tom Liston, P.E., Mechanical Engineer
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What is the viscosity of air at 0.56 atmospheres, 70F?

I'm computing the difference of arrow launch angle at 15,000 ft above sea level versus launch angle at sea level.
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Old   September 11, 2007, 01:06
Default Re: help! how to calculate air viscosity
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GOPALAKRISHNAN
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i urgently in need ,how to calculate the viscosity and renolds number.suppose my diameter=.33 ft, velocity =65ft/sec and density=0.075lbs/ft3 how can i calculate renolds number.please help me sir.
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Old   March 11, 2008, 08:23
Default Re: help! air viscosity versus pressure
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S CHATTERJEE
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please send to me the air viscosity vs pressure table and also how to calculate air friction coefficient while a rotor is rotating inside stagnant air
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Old   September 2, 2008, 11:45
Default Re: help! air viscosity versus pressure
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Ramesh babu
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we have micro porosity issue with aluminium casting, where the application of the products uses ink as media, which is more viscosity than air which is used for qualifications & testing. Please mail me the relationship, if u receive from anyone. I am looking fo the same.
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Old   January 27, 2009, 13:48
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ramkumar
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hi......... can u please help me out in finding relation ship b/n pressure & viscosity
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Old   February 13, 2009, 01:47
Default Re: help! air viscosity versus pressure
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umar
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You're unlikely to find anything that calculates viscosity as a function of pressure because it varies little (Crane says no more than 10% up to a pressure of 500 bar.pressure variatiom has hardly any effect on viscosity.
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Old   July 21, 2009, 17:04
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Bahman Aghdaie
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I have the same question regarding the releationship of air viscosity versus pressure. I my case, I am dealing with vacuum. I have noticed that the actual vacuum experienced in our systems is about 20-30% lower that what we calaculate using Reynolds number and friction facrtor calculated with standard air viscosity values.
I am wondering if vacuum "lack of air" reduces the viscosity.
I have not had much luck finding a formula to relate pressure and viscousity of air.
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Old   March 18, 2015, 14:45
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Muhammad Waqas
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Hello everyone

Have you found the relationship b/w viscosity and pressure. Please let me know also. thank you
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