Wall y                         
                        +
                                                  strategy for modelling rotating annular flow using CFD

Andrew A. Davidson; Salim M. Salim

Wall y ⁺ strategy for modelling rotating annular flow using CFD

Andrew A. Davidson, Salim M. Salim

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

7 Citations (Scopus)

310 Downloads (Pure)

Abstract

A Strategy for modelling rotating annular flow within CFD is developed with the aid of the wall y ⁺ . The strategy will allow the pressure loss, and the effect any drilling tools has on this, to be investigated and analyzed at a reduced time and cost compared to more conventional methods. Five turbulence models were investigated and the k – ω model was found to be the most accurate for a wall y ⁺ of less than 5 due to the low Reynolds number found in these flow situations. The k – ε model performed least well, upon investigation of the turbulence models it was found that there was a direct link between the turbulent intensity found in the annulus and the performance in predicting pressure loss. The k – ε model was found to drastically over predict the turbulent kinetic energy for the mesh set up and thus gave inaccurate results regarding the pressure loss in the annulus. This paper suggests that a structured mesh with a y ⁺ < 5 and the k – ω turbulence model will provide sufficiently accurate data in the investigation of pressure loss in an annulus.

Original language	English
Title of host publication	Proceedings of the International MultiConference of Engineers and Computer Scientists 2018, IMECS 2018
Editors	Oscar Castillo, David Dagan Feng, A.M. Korsunsky, Craig Douglas, S. I. Ao
Publisher	Newswood Limited
ISBN (Electronic)	9789881404886
Publication status	Published - 1 Jan 2018
Event	2018 International MultiConference of Engineers and Computer Scientists, IMECS 2018 - Hong Kong, Hong Kong Duration: 14 Mar 2018 → 16 Mar 2018

Publication series

Name	Lecture Notes in Engineering and Computer Science
Volume	2
ISSN (Print)	2078-0958

Conference

Conference	2018 International MultiConference of Engineers and Computer Scientists, IMECS 2018
Country/Territory	Hong Kong
City	Hong Kong
Period	14/03/18 → 16/03/18

ASJC Scopus subject areas

Computer Science (miscellaneous)

Access to Document

Final Published VersionFinal published version, 968 KB

Cite this

Davidson, A. A., & Salim, S. M. (2018). Wall y ⁺ strategy for modelling rotating annular flow using CFD. In O. Castillo, D. D. Feng, A. M. Korsunsky, C. Douglas, & S. I. Ao (Eds.), Proceedings of the International MultiConference of Engineers and Computer Scientists 2018, IMECS 2018 (Lecture Notes in Engineering and Computer Science; Vol. 2). Newswood Limited.

Davidson, Andrew A. ; Salim, Salim M. / Wall y ⁺ strategy for modelling rotating annular flow using CFD. Proceedings of the International MultiConference of Engineers and Computer Scientists 2018, IMECS 2018. editor / Oscar Castillo ; David Dagan Feng ; A.M. Korsunsky ; Craig Douglas ; S. I. Ao. Newswood Limited, 2018. (Lecture Notes in Engineering and Computer Science).

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abstract = " A Strategy for modelling rotating annular flow within CFD is developed with the aid of the wall y + . The strategy will allow the pressure loss, and the effect any drilling tools has on this, to be investigated and analyzed at a reduced time and cost compared to more conventional methods. Five turbulence models were investigated and the k – ω model was found to be the most accurate for a wall y + of less than 5 due to the low Reynolds number found in these flow situations. The k – ε model performed least well, upon investigation of the turbulence models it was found that there was a direct link between the turbulent intensity found in the annulus and the performance in predicting pressure loss. The k – ε model was found to drastically over predict the turbulent kinetic energy for the mesh set up and thus gave inaccurate results regarding the pressure loss in the annulus. This paper suggests that a structured mesh with a y + < 5 and the k – ω turbulence model will provide sufficiently accurate data in the investigation of pressure loss in an annulus. ",

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Davidson, AA & Salim, SM 2018, Wall y ⁺ strategy for modelling rotating annular flow using CFD. in O Castillo, DD Feng, AM Korsunsky, C Douglas & SI Ao (eds), Proceedings of the International MultiConference of Engineers and Computer Scientists 2018, IMECS 2018. Lecture Notes in Engineering and Computer Science, vol. 2, Newswood Limited, 2018 International MultiConference of Engineers and Computer Scientists, IMECS 2018, Hong Kong, Hong Kong, 14/03/18.

Wall y ⁺ strategy for modelling rotating annular flow using CFD. / Davidson, Andrew A.; Salim, Salim M.
Proceedings of the International MultiConference of Engineers and Computer Scientists 2018, IMECS 2018. ed. / Oscar Castillo; David Dagan Feng; A.M. Korsunsky; Craig Douglas; S. I. Ao. Newswood Limited, 2018. (Lecture Notes in Engineering and Computer Science; Vol. 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AB - A Strategy for modelling rotating annular flow within CFD is developed with the aid of the wall y + . The strategy will allow the pressure loss, and the effect any drilling tools has on this, to be investigated and analyzed at a reduced time and cost compared to more conventional methods. Five turbulence models were investigated and the k – ω model was found to be the most accurate for a wall y + of less than 5 due to the low Reynolds number found in these flow situations. The k – ε model performed least well, upon investigation of the turbulence models it was found that there was a direct link between the turbulent intensity found in the annulus and the performance in predicting pressure loss. The k – ε model was found to drastically over predict the turbulent kinetic energy for the mesh set up and thus gave inaccurate results regarding the pressure loss in the annulus. This paper suggests that a structured mesh with a y + < 5 and the k – ω turbulence model will provide sufficiently accurate data in the investigation of pressure loss in an annulus.

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Davidson AA, Salim SM. Wall y ⁺ strategy for modelling rotating annular flow using CFD. In Castillo O, Feng DD, Korsunsky AM, Douglas C, Ao SI, editors, Proceedings of the International MultiConference of Engineers and Computer Scientists 2018, IMECS 2018. Newswood Limited. 2018. (Lecture Notes in Engineering and Computer Science).