Fahlbeck et al - 2022 - A head loss pressure boundary condition

bigphil · January 10, 2022, 11:23

Comments and questions are welcomed on the article Fahlbeck et al, A head loss pressure boundary condition for hydraulic systems, OpenFOAM Journal, January 2022, https://doi.org/10.51560/ofj.v2.69.

jonfah · January 18, 2022, 07:09

Hi everyone,

I am the main author of this publication and I will gladly answer any question you may have regarding the boundary condition or the paper.

j-avdeev · January 27, 2022, 14:05

Quote:

Originally Posted by jonfah

Hi everyone,

I am the main author of this publication and I will gladly answer any question you may have regarding the boundary condition or the paper.

Hi,
is your test case open and available to download and run?

jonfah · January 28, 2022, 01:21

Yes, a test case and the source code is available via the link posted by bigphil on the OpenFOAM journal website. Please let me know if you have any problems with downloading them, in that case I can send them to you instead.

ginop · June 1, 2023, 04:42

Quote:

Originally Posted by bigphil

Comments and questions are welcomed on the article Fahlbeck et al, A head loss pressure boundary condition for hydraulic systems, OpenFOAM Journal, January 2022, https://doi.org/10.51560/ofj.v2.69.

bigphil, jonfah,
how hard would it be to make it work for twoPhaseEulerFoam? is there any work already being done/initiated towards that?

Limited to cases with small volume fractions of the dispersed phase (maybe <2-3%), I wonder whether it is still valid to prescribe loss(es) for the continuous phase only, or not--so impose headLossPressure BC for the continuous phase only?

Typical application with such limitation would be air/water mixture in bubble/dispersed flow regime.

Thank you in advance

jonfah · June 1, 2023, 10:07

Hi ginop,

We are not working with multiphase flow, so the simple answer is that I do not know. In principle it should be possible to use the boundary condition if you only have one phase present at the patch. With the current implementation the kinematic viscosity is taken as the average value on the patch, while the density (if not kinematic pressure is used) is multiplied on a face-by-face basis to the head losses.

Please let me know if you have any success using the boundary condition with the twoPhaseEulerFoam solver.

January 10, 2022, 11:23	Fahlbeck et al - 2022 - A head loss pressure boundary condition	#1
bigphil Super Moderator Philip Cardiff Join Date: Mar 2009 Location: Dublin, Ireland Posts: 1,089 Rep Power: 34	Comments and questions are welcomed on the article Fahlbeck et al, A head loss pressure boundary condition for hydraulic systems, OpenFOAM Journal, January 2022, https://doi.org/10.51560/ofj.v2.69. ginop likes this. Last edited by bigphil; April 11, 2022 at 08:00. Reason: Paper published, and title slightly changed. Update link and date format

January 18, 2022, 07:09		#2
jonfah New Member Jonathan Join Date: Feb 2018 Location: Gothenburg, Sweden Posts: 5 Rep Power: 8	Hi everyone, I am the main author of this publication and I will gladly answer any question you may have regarding the boundary condition or the paper. bigphil and IHFOAM Team like this.

January 28, 2022, 01:21		#4
jonfah New Member Jonathan Join Date: Feb 2018 Location: Gothenburg, Sweden Posts: 5 Rep Power: 8	Yes, a test case and the source code is available via the link posted by bigphil on the OpenFOAM journal website. Please let me know if you have any problems with downloading them, in that case I can send them to you instead. bigphil likes this.

June 1, 2023, 10:07		#6
jonfah New Member Jonathan Join Date: Feb 2018 Location: Gothenburg, Sweden Posts: 5 Rep Power: 8	Hi ginop, We are not working with multiphase flow, so the simple answer is that I do not know. In principle it should be possible to use the boundary condition if you only have one phase present at the patch. With the current implementation the kinematic viscosity is taken as the average value on the patch, while the density (if not kinematic pressure is used) is multiplied on a face-by-face basis to the head losses. Please let me know if you have any success using the boundary condition with the twoPhaseEulerFoam solver. ginop likes this.

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