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Research Papers: Energy Systems Analysis

Determination of Newtonian Fluid Flow Behavior Including Temperature Effects in Fully Eccentric Annulus

[+] Author and Article Information
Erman Ulker

Department of Civil Engineering,
Izmir Katip Celebi University,
Izmir 35620, Turkey
e-mail: erman.ulker@ikc.edu.tr

Mehmet Sorgun

Department of Civil Engineering,
Izmir Katip Celebi University,
Izmir 35620, Turkey
e-mail: mehmetsorgun@gmail.com

Ismail Solmus

Department of Mechanical Engineering,
Ataturk University,
Erzurum 25240, Turkey
e-mail: solmus@atauni.edu.tr

Ziya Haktan Karadeniz

Department of Mechanical Engineering,
Izmir Katip Celebi University,
Izmir 35620, Turkey
e-mail: zhaktan.karadeniz@ikc.edu.tr

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received August 29, 2016; final manuscript received January 21, 2017; published online February 24, 2017. Assoc. Editor: Antonio J. Bula.

J. Energy Resour. Technol 139(4), 042001 (Feb 24, 2017) (5 pages) Paper No: JERT-16-1351; doi: 10.1115/1.4035908 History: Received August 29, 2016; Revised January 21, 2017

In this work, the effect of temperature on the pressure loss for Newtonian fluid in fully eccentric annulus with pipe rotation is investigated. Extensive experiments with water are conducted at Izmir Katip Celebi University (IKCU), Civil Engineering Department for various flow velocities ranging between 0.7 m/s and 2.9 m/s, pipe rotation range between 0 rpm and 120 rpm. The effect of temperature on frictional pressure losses is also examined, and the temperature is varied from 20 °C to 65 °C. It was observed that, an increase in the fluid temperature in fully eccentric annulus results in a decrease in the pressure gradient. On the other hand, the influence of temperature on pressure gradient becomes more significant, as the Reynolds number is raised. Variation of Taylor number causes negligible changes on frictional pressure losses for all temperature conditions considered. By using regression analysis of the dataset obtained from the experimental work, a simple empirical frictional pressure losses correlation taking into account of temperature effect is proposed. Results showed that a good agreement between the measured and predicted values is achieved with almost 94% coefficient of determination.

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Figures

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Fig. 1

A photograph of the experimental flow loop with its primary components: 1. Motto for pipe rotation and its control, 2. pressure transmitter, 3. flowmeter, 4. butterfly valve, 5. heater control unit, and 6. stirring motor

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Fig. 2

Annular frictional pressure gradient (Pa/m) with respect to Reynolds number

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Fig. 3

Annular frictional pressure gradient (Pa/m) with respect to inverse of Prandtl number at Re = 60,000 and Ta = 0

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Fig. 4

Temperature effect on pressure gradient for different Reynolds Number

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Fig. 5

Annular frictional pressure gradient ratio with respect to Taylor number at Re = 60,000 for different temperature values

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Fig. 6

Annular frictional pressure gradient with respect to Reynolds number

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Fig. 7

A0 with respect to Taylor number on semilog scale

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Fig. 8

B01 with respect to Prandtl number (Pr)

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Fig. 9

Comparison of experimental annular frictional pressure loss measurements with predicted results obtained by correlation

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