defining discrete density profile in a domain

m00nmun · July 28, 2013, 21:46

I am working on stably stratified environmental flows. I have to define two density profile which varying with depth. Such as one profile is from h to h-b and another profile is from h-b to 0. Kindly suggest me the way to perform it. Thank you.

ghorrocks · July 29, 2013, 00:15

I have no idea what h and h-b means.

The density is caused by a combination of temperature, pressure and possibly additional stuff (eg salt content). You have to define the temperature, pressure and/or stuff (salt) values and you will get your density profile.

m00nmun · July 29, 2013, 00:56

Quote:

Originally Posted by ghorrocks

I have no idea what h and h-b means.

The density is caused by a combination of temperature, pressure and possibly additional stuff (eg salt content). You have to define the temperature, pressure and/or stuff (salt) values and you will get your density profile.

thank you ghorrocks for your reply. I know the profile of density. How ever it is depth dependent. For instance, there is two layer of density and an interface one is upto 0 to H-h and another is from H-h to H, where H is depth of domain. Density is a function of temperature. I have to define this profile with CEL during initialization, kindly suggest me in this regard. Thank you.

ghorrocks · July 29, 2013, 08:07

If density is a function of temperature only and you know the density then you know the temperature as well. So then you can specify the temperature initial condition, and set density to be a the function of temperature.

Have a look at the CEL expressions for writing functions. And set the density to be the function of temperature and there you have it.

July 28, 2013, 21:46	defining discrete density profile in a domain	#1
m00nmun New Member mrityunjay sahu Join Date: Jun 2013 Posts: 5 Rep Power: 12	I am working on stably stratified environmental flows. I have to define two density profile which varying with depth. Such as one profile is from h to h-b and another profile is from h-b to 0. Kindly suggest me the way to perform it. Thank you.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
defining temperature profile with UDF	mohammadkm	Fluent UDF and Scheme Programming	11	July 3, 2013 00:15
Generating Velocity Profile inside domain.	Hisham	OpenFOAM	0	June 7, 2011 07:25
air bubble is disappear increasing time using vof	xujjun	CFX	9	June 9, 2009 07:59
defining the domain	umesh	CFX	0	March 14, 2009 00:18
Discrete Inlet Velocity Profile	retech	OpenFOAM Pre-Processing	4	November 12, 2008 06:20

July 29, 2013, 00:15		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	I have no idea what h and h-b means. The density is caused by a combination of temperature, pressure and possibly additional stuff (eg salt content). You have to define the temperature, pressure and/or stuff (salt) values and you will get your density profile.

July 29, 2013, 08:07		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	If density is a function of temperature only and you know the density then you know the temperature as well. So then you can specify the temperature initial condition, and set density to be a the function of temperature. Have a look at the CEL expressions for writing functions. And set the density to be the function of temperature and there you have it.