The effect of turbulence on the efficiency of the rotational phase separator

J.G.M. Kuerten, B.P.M. Esch, van, H.P. Kemenade, van, J.J.H. Brouwers

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Abstract

The Rotational Phase Separator (RPS) is a device to separate liquid or solid particles from a lighter or heavier fluid by centrifugation in a bundle of channels which rotate around a common axis. Originally, the RPS was designed in such a way thatthe flow through the channels is laminar in order to avoid eddies in which the particles keep circulating and do not reach the walls. However, in some applications the required volume flow of fluid is so large, that turbulent flow can no longer be avoided. Direct numerical simulation (DNS) of the flow in a single rotating pipe and particle tracking in this flow are applied to study the influence of turbulenceon the collection efficiency of the RPS. The results show that the collection efficiency for larger particles decreases by up to 25% due to the turbulence, whereas the collection efficiency for smaller particles is unaffected. The adverse effect ofthe resulting swirling flow is partly counteracted by turbulent dispersion. For high rotational speeds the efficiency decreases further as the particles are trapped in a counter-rotating vortex.
Original languageEnglish
Pages (from-to)630-637
JournalInternational Journal of Numerical Methods for Heat and Fluid Flow
Volume28
Issue number4
DOIs
Publication statusPublished - 2007

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Separator
Separators
Turbulence
Rotating
Swirling flow
Centrifugation
Direct numerical simulation
Swirling Flow
Fluid
Decrease
Particle Tracking
Turbulent flow
Flow of fluids
Vortex flow
Turbulent Flow
Pipe
Vortex
Bundle
Fluids
Liquid

Cite this

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title = "The effect of turbulence on the efficiency of the rotational phase separator",
abstract = "The Rotational Phase Separator (RPS) is a device to separate liquid or solid particles from a lighter or heavier fluid by centrifugation in a bundle of channels which rotate around a common axis. Originally, the RPS was designed in such a way thatthe flow through the channels is laminar in order to avoid eddies in which the particles keep circulating and do not reach the walls. However, in some applications the required volume flow of fluid is so large, that turbulent flow can no longer be avoided. Direct numerical simulation (DNS) of the flow in a single rotating pipe and particle tracking in this flow are applied to study the influence of turbulenceon the collection efficiency of the RPS. The results show that the collection efficiency for larger particles decreases by up to 25{\%} due to the turbulence, whereas the collection efficiency for smaller particles is unaffected. The adverse effect ofthe resulting swirling flow is partly counteracted by turbulent dispersion. For high rotational speeds the efficiency decreases further as the particles are trapped in a counter-rotating vortex.",
author = "J.G.M. Kuerten and {Esch, van}, B.P.M. and {Kemenade, van}, H.P. and J.J.H. Brouwers",
year = "2007",
doi = "10.1016/j.ijheatfluidflow.2007.03.003",
language = "English",
volume = "28",
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journal = "International Journal of Numerical Methods for Heat and Fluid Flow",
issn = "0961-5539",
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}

The effect of turbulence on the efficiency of the rotational phase separator. / Kuerten, J.G.M.; Esch, van, B.P.M.; Kemenade, van, H.P.; Brouwers, J.J.H.

In: International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 28, No. 4, 2007, p. 630-637.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - The effect of turbulence on the efficiency of the rotational phase separator

AU - Kuerten, J.G.M.

AU - Esch, van, B.P.M.

AU - Kemenade, van, H.P.

AU - Brouwers, J.J.H.

PY - 2007

Y1 - 2007

N2 - The Rotational Phase Separator (RPS) is a device to separate liquid or solid particles from a lighter or heavier fluid by centrifugation in a bundle of channels which rotate around a common axis. Originally, the RPS was designed in such a way thatthe flow through the channels is laminar in order to avoid eddies in which the particles keep circulating and do not reach the walls. However, in some applications the required volume flow of fluid is so large, that turbulent flow can no longer be avoided. Direct numerical simulation (DNS) of the flow in a single rotating pipe and particle tracking in this flow are applied to study the influence of turbulenceon the collection efficiency of the RPS. The results show that the collection efficiency for larger particles decreases by up to 25% due to the turbulence, whereas the collection efficiency for smaller particles is unaffected. The adverse effect ofthe resulting swirling flow is partly counteracted by turbulent dispersion. For high rotational speeds the efficiency decreases further as the particles are trapped in a counter-rotating vortex.

AB - The Rotational Phase Separator (RPS) is a device to separate liquid or solid particles from a lighter or heavier fluid by centrifugation in a bundle of channels which rotate around a common axis. Originally, the RPS was designed in such a way thatthe flow through the channels is laminar in order to avoid eddies in which the particles keep circulating and do not reach the walls. However, in some applications the required volume flow of fluid is so large, that turbulent flow can no longer be avoided. Direct numerical simulation (DNS) of the flow in a single rotating pipe and particle tracking in this flow are applied to study the influence of turbulenceon the collection efficiency of the RPS. The results show that the collection efficiency for larger particles decreases by up to 25% due to the turbulence, whereas the collection efficiency for smaller particles is unaffected. The adverse effect ofthe resulting swirling flow is partly counteracted by turbulent dispersion. For high rotational speeds the efficiency decreases further as the particles are trapped in a counter-rotating vortex.

U2 - 10.1016/j.ijheatfluidflow.2007.03.003

DO - 10.1016/j.ijheatfluidflow.2007.03.003

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EP - 637

JO - International Journal of Numerical Methods for Heat and Fluid Flow

JF - International Journal of Numerical Methods for Heat and Fluid Flow

SN - 0961-5539

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ER -