Surface tension gradient

Faraam · February 6, 2022, 09:38

Hello,

is there a way to express the surface tension gradient along a boundary in e.g. x-direction in STAR-CCM+?

LuckyTran · February 7, 2022, 09:20

Can you be a bit more specific as to what you're looking for? Surface tension is a tensor with unit dyads. The gradient of surface tension is an even higher order tensor and x-direction of a n+1 rank tensor is meaningless because its unit vectors are triads.

Accessing components of fields (whether they are scalars, vectors, or tensors) in Star-CCM is just a matter of referencing the proper index: i.e. [0],[1],[2] and so on but that is predicated on you having the expression for whatever it is you are looking for written down first.

February 6, 2022, 09:38	Surface tension gradient	#1
Faraam New Member Join Date: Aug 2021 Posts: 5 Rep Power: 4	Hello, is there a way to express the surface tension gradient along a boundary in e.g. x-direction in STAR-CCM+?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Surface tension driven flows: interFoam vs. multiphaseInterFoam	dzordz	OpenFOAM Programming & Development	3	December 22, 2021 02:57
surface tension as function of normal gradient	tom	FLUENT	2	September 7, 2016 03:48
Surface Tension Force Model	Miguel	CFX	7	October 2, 2006 05:30
UDF for surface tension gradient	kiran	FLUENT	2	July 15, 2003 12:00
CFX4.3 -build analysis form	Chie Min	CFX	5	July 12, 2001 23:19

February 7, 2022, 09:20		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,679 Rep Power: 66	Can you be a bit more specific as to what you're looking for? Surface tension is a tensor with unit dyads. The gradient of surface tension is an even higher order tensor and x-direction of a n+1 rank tensor is meaningless because its unit vectors are triads. Accessing components of fields (whether they are scalars, vectors, or tensors) in Star-CCM is just a matter of referencing the proper index: i.e. [0],[1],[2] and so on but that is predicated on you having the expression for whatever it is you are looking for written down first.