# How can I set the inlet pressure?

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

 August 18, 2003, 15:52 How can I set the inlet pressure? #1 moon Guest   Posts: n/a For an incompressible flow, I use the velocity inlet and outflow condition. How can I set the inlet pressure(7bar)?

 August 18, 2003, 16:10 Re: How can I set the inlet pressure? #2 Jason Guest   Posts: n/a In Define --> Operation condition The pressure in boundary condition(if you defined) is based on this pressure, i.e. gauge pressure.

 August 18, 2003, 17:11 Re: How can I set the inlet pressure? #3 moon Guest   Posts: n/a default value is 1bar in operating pressure. I want to make the pressure 7bar or above is it possible without any treatments

 August 18, 2003, 18:02 Re: How can I set the inlet pressure? #4 Jason Guest   Posts: n/a sure you can change it directly. Bearing in mind that the pressure will change gas density and hence velocity if you are using mass_flow_inlet and defining material density as incompressible ideal gas.

 August 18, 2003, 19:08 Re: How can I set the inlet pressure? #5 moon Guest   Posts: n/a I define material density as incompressible ideal gas. when I set the operating pressure 7bar, density become 7times higher than that of 1bar. I just want to use air under the 7bar pressure. How can I make it?

 August 18, 2003, 19:21 Re: How can I set the inlet pressure? #6 moon Guest   Posts: n/a when I set the material, fluent questions whether overwrite the air or make new material. I made it new. is it wrong?

 August 19, 2003, 10:23 Re: How can I set the inlet pressure? #7 Rahul Hiwale Guest   Posts: n/a Hi Moon, If you need density of air at 1 bar then use constant density and give operating pressure as 7 bar. You can also use inlet pressure bc in that case use pressure as 7 bar + kinetic pressure (1/2.rho.v2) for incompressibale flow. Fluent won't ask you to overwrite unless you change fluid/solid name. If you overwrite it will set that new mateial as default material instead of old material. Rahul

 August 19, 2003, 14:17 Re: How can I set the inlet pressure? #8 moon Guest   Posts: n/a Thank you and Jason for your answer. If I have a problem with property variation(air) due to high heat flux and can't use constant density, what must I do? I use an incompressible ideal gas law for density and other properties as a function of temperature. all properties varies mainly with temperature. I use a segregated solver, not coupled. is it wrong?

 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 AdidaKK CFX 12 February 11, 2010 21:28 ruined FLUENT 1 March 26, 2008 06:30 Chris CD-adapco 2 June 21, 2005 08:20 Ben FLUENT 0 November 21, 2004 02:47 Christian FLUENT 0 April 15, 2003 07:24

All times are GMT -4. The time now is 21:59.