# help! air viscosity versus pressure

 Register Blogs Members List Search Today's Posts Mark Forums Read

 August 30, 2005, 15:19 help! air viscosity versus pressure #1 lin Guest   Posts: n/a 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!!

 July 26, 2006, 05:00 Re: help! air viscosity versus pressure #2 Isra bani hani Guest   Posts: n/a 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!! -------------------------------------------------------------------------------- Post Response

 December 7, 2006, 20:20 Re: help! air viscosity versus pressure #3 ginger Guest   Posts: n/a 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.

 July 17, 2007, 02:13 Re: help! air viscosity versus pressure #4 alirez Guest   Posts: n/a please send to me the air viscosity vs temprature table

 August 30, 2007, 20:02 Re: help! air viscosity versus pressure #5 Tom Liston, P.E., Mechanical Engineer Guest   Posts: n/a 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.

 September 11, 2007, 01:06 Re: help! how to calculate air viscosity #6 GOPALAKRISHNAN Guest   Posts: n/a 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.

 March 11, 2008, 08:23 Re: help! air viscosity versus pressure #7 S CHATTERJEE Guest   Posts: n/a 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

 September 2, 2008, 11:45 Re: help! air viscosity versus pressure #8 Ramesh babu Guest   Posts: n/a 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.

 January 27, 2009, 13:48 Re: help! air viscosity versus pressure #9 ramkumar Guest   Posts: n/a hi......... can u please help me out in finding relation ship b/n pressure & viscosity

 February 13, 2009, 01:47 Re: help! air viscosity versus pressure #10 umar Guest   Posts: n/a 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.

 July 21, 2009, 17:04 #11 New Member   Bahman Aghdaie Join Date: Jul 2009 Posts: 1 Rep Power: 0 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.

 March 18, 2015, 14:45 #12 Member   Muhammad Waqas Join Date: Jul 2014 Location: Germany Posts: 53 Rep Power: 4 Hello everyone Have you found the relationship b/w viscosity and pressure. Please let me know also. thank you

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Vincent Main CFD Forum 5 July 28, 2008 06:28 lin NUMECA 2 November 3, 2005 23:43 lin CFX 4 November 1, 2005 16:12 lin Main CFD Forum 2 August 30, 2005 16:42 lin FLUENT 0 August 30, 2005 15:14

All times are GMT -4. The time now is 19:37.