Critical Temperature of Liquids

raghav612 · March 18, 2015, 03:53

Hello all,
Is it possible to operate fluids like pentane, hexane, butane etc above their critical temperature? If yes, then what are its consequences? If not, how do i determine the maximum pressure and teperature under which they can be operated?
Ps: sorry for the error

Boris_M · March 18, 2015, 09:14

I'm confused. Do you mean to use them as gas passing the critical pressure becoming liquid or as liquid passing the critical pressure? I'm asking because your header was kind of misleading to the rest of the post.
In general you can use Real Gas as a fluid which considered the supercritical region too. But you will need the properties as only Methane and Propane is available in the database.

Boris

raghav612 · March 18, 2015, 09:31

Hello Boris,

Sorry there was a mistake on my side. I am operating the fluid just below its critical pressure but above its critical temperature. Is this scenario practically possible?
Ps: I am trying to simulate a Rankine Cycle

March 18, 2015, 03:53	Critical Temperature of Liquids	#1
raghav612 New Member Raghav Join Date: Mar 2015 Posts: 2 Rep Power: 0	Hello all, Is it possible to operate fluids like pentane, hexane, butane etc above their critical temperature? If yes, then what are its consequences? If not, how do i determine the maximum pressure and teperature under which they can be operated? Ps: sorry for the error Last edited by raghav612; March 18, 2015 at 09:34.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Shadow Wall and temperature	norger	FLUENT	10	September 28, 2019 11:43
fluid flow but temperature raises from nowhere?	mxcfd	STAR-CCM+	5	September 16, 2014 05:46
Inlet won't apply UDF and has temperature at 0K!	tccruise	Fluent UDF and Scheme Programming	2	September 14, 2012 06:08
difference of temperature	HKH	FLUENT	0	January 28, 2010 02:45
monitoring point of total temperature	rogbrito	FLUENT	0	June 21, 2009 17:31

March 18, 2015, 09:14		#2
Boris_M Disabled Join Date: Jul 2009 Posts: 616 Rep Power: 23	I'm confused. Do you mean to use them as gas passing the critical pressure becoming liquid or as liquid passing the critical pressure? I'm asking because your header was kind of misleading to the rest of the post. In general you can use Real Gas as a fluid which considered the supercritical region too. But you will need the properties as only Methane and Propane is available in the database. Boris

March 18, 2015, 09:31		#3
raghav612 New Member Raghav Join Date: Mar 2015 Posts: 2 Rep Power: 0	Hello Boris, Sorry there was a mistake on my side. I am operating the fluid just below its critical pressure but above its critical temperature. Is this scenario practically possible? Ps: I am trying to simulate a Rankine Cycle