Define periodic alpha.water value at the inlet

ksw5834 · March 18, 2019, 05:33

Hello,

I am now using OpenFOAM-v1706 to bubble flow with turbulent channel. I want to implement to use periodical alpha.water condition from the nozzle inlet instead of fixed alpha.water value. The periodic alpha.water value should change with time like a sine function for periodic bubble clusters like below picture.

Could anyone tell me how to define this periodic alpha.water value and what is the best to this between function object and custom boundary condition?

thintn222 · March 27, 2019, 03:14

Same problem !I wonder did you solve that, sir

gkarlsen · March 31, 2019, 12:31

You can use uniformFixedValue boundary condition for this. It supports sine, table and a bunch of other time variations. Alternatively groovyBC will also do this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[ICEM] Can I define periodic boundaries in an unstructured mesh?	Aoki	ANSYS Meshing & Geometry	11	September 14, 2018 02:52
HELP,how to define the periodic boudary conditions using the icem mesh?	dada1204	FLUENT	2	May 1, 2012 18:06
[ICEM] how to define periodic for free type face in hexa meshing	mingersai	ANSYS Meshing & Geometry	0	February 5, 2012 02:55
[ICEM] how to define periodic in icem ?	mingersai	ANSYS Meshing & Geometry	1	February 3, 2012 18:46
UDF carbon conversion	papteo	Fluent UDF and Scheme Programming	1	August 18, 2011 08:32

March 27, 2019, 03:14		#2
thintn222 New Member John Join Date: Mar 2019 Posts: 26 Rep Power: 7	Same problem !I wonder did you solve that, sir

March 31, 2019, 12:31		#3
gkarlsen Member Geir Karlsen Join Date: Nov 2013 Location: Norway Posts: 59 Rep Power: 14	You can use uniformFixedValue boundary condition for this. It supports sine, table and a bunch of other time variations. Alternatively groovyBC will also do this.