Accumulation of Field Functions (VOF environment)

SimonP · July 31, 2014, 04:25

Hi guys,

I've been doing some research already, but didn't find a proper solution for the following problem:

I want to generate some User-Field functions for my VOF-simulation that accumulate certain quantities over the simulation-time (e.g. total mass flow through a cell or a flow length [from inlet to a certain location]).

As for the flow-length (s) I know from other software-packages that for Eulerian-Grids it works like this:
1) s0=0
2) calculate flux through the cell
3) s1=Cell size
4) hand over s0+s1 to the next cell (depending on the velocity vector)

Of course inaccuracies can arise in circulation zones.

Cheers

me3840 · July 31, 2014, 04:40

Take a look at field sums in the user guide.

SimonP · July 31, 2014, 05:25

Cheers, didn't think of that!
But is there a possibility to use the sum per element and not per selected region?

The sum-report usually returns only one scalar value for the selected Region/Part

me3840 · July 31, 2014, 09:11

No, not a sum report. A field sum is different. Look it up in the user guide. It has a single value for every cell.

cwl · August 2, 2014, 10:40

Wow. I didn't even know of Field Monitors. Thanx a lot :>

July 31, 2014, 04:25	Accumulation of Field Functions (VOF environment)	#1
SimonP New Member Join Date: Jul 2014 Posts: 4 Rep Power: 11	Hi guys, I've been doing some research already, but didn't find a proper solution for the following problem: I want to generate some User-Field functions for my VOF-simulation that accumulate certain quantities over the simulation-time (e.g. total mass flow through a cell or a flow length [from inlet to a certain location]). As for the flow-length (s) I know from other software-packages that for Eulerian-Grids it works like this: 1) s0=0 2) calculate flux through the cell 3) s1=Cell size 4) hand over s0+s1 to the next cell (depending on the velocity vector) Of course inaccuracies can arise in circulation zones. Cheers

July 31, 2014, 09:11		#4
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	No, not a sum report. A field sum is different. Look it up in the user guide. It has a single value for every cell. bjtuzhang likes this.

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July 31, 2014, 04:40		#2
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	Take a look at field sums in the user guide.

July 31, 2014, 05:25		#3
SimonP New Member Join Date: Jul 2014 Posts: 4 Rep Power: 11	Cheers, didn't think of that! But is there a possibility to use the sum per element and not per selected region? The sum-report usually returns only one scalar value for the selected Region/Part

August 2, 2014, 10:40		#5
cwl Senior Member Chaotic Water Join Date: Jul 2012 Location: Elgrin Fau Posts: 435 Rep Power: 17	Wow. I didn't even know of Field Monitors. Thanx a lot :>