CFD Analysis of Stratification and Rollover Phenomena in an Industrial-Scale LNG Storage Tank

Saleem, Abdullah and Farooq, Shamsuzzaman and Karimi, Iftekhar A. and Banerjee, Raja (2020) CFD Analysis of Stratification and Rollover Phenomena in an Industrial-Scale LNG Storage Tank. Industrial & Engineering Chemistry Research, 59 (31). pp. 14126-14144. ISSN 0888-5885

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Abstract

Stratification and rollover are two least understood operationally critical phenomena in liquefied natural gas (LNG) storage. Stratification is a prerequisite for rollover, but very little is known about the conditions instigating stratification inside an industrial LNG storage tank. The conditions leading to stratification are identified, and a detailed computational fluid dynamics analysis of rollover is presented. The critical density difference between heel and refilled LNG above which stratification occurs is 0.8 kg/m3 for bottom filling and 2.2 kg/m3 for top filling. Density equilibration and interface disruption due to saturation in the higher density layer are the two underlying rollover mechanisms. Rollover case studies are performed covering a wide range of heel and refilled LNG combinations. The time history of boil-off gas generation rate during rollover is a measure of the intensity of mixing, and the peak rate can be over 150 times higher than the normal rate.

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IITH Creators:

IITH Creators	ORCiD
Banerjee, Raja	http://orcid.org/0000-0002-7163-1470

Item Type:

Article

Uncontrolled Keywords:

Computational fluid dynamics, Tanks (containers), Case-studies, CFD analysis, Computational fluid dynamics analysis, Critical density, Critical phenomenon, Industrial scale, Liquefied Natural Gas (LNG)LNG storage tank

Subjects:

Physics
Physics > Pneumatics
Physics > Sound, light and Heat
Physics > Modern physics

Divisions:

Department of Mechanical & Aerospace Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

28 May 2021 05:20

Last Modified:

28 May 2021 05:20

URI:

http://raiithold.iith.ac.in/id/eprint/7858