THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Chengzheng Cai

,

Keda Ren

,

Qinghua Li

NUMERICAL SIMULATION OF THE FLOW FIELD STRUCTURE OF LIQUID NITROGEN JET

ABSTRACT
Liquid nitrogen jet is regarded as an excellent technology for the well drilling and reservoir fracturing. To evaluate the flow field structure of liquid nitrogen jet, a 2-D CFD model is established. The transient velocity and temperature fields of liquid nitrogen jet is simulated. The results show that the liquid nitrogen jet also clearly presented the velocity boundary and potential core region similar to the water jet. Given the temperature difference between the jet and surrounding fluid, the liquid nitrogen jet has an obvious temperature boundary, on which the jet temperature is equal to the initial value. According to the phase of the jet, the flow structure can be divided into the liquid nitrogen jet and non-liquid nitrogen jet regions. The temperature boundary shows a larger width than the velocity boundary for liquid nitrogen jet. Moreover, both width and length of the liquid nitrogen jet region are greater than the potential core region.
KEYWORDS
liquid nitrogen jet, flow field structure, well drilling, reservoir fracturing, numerical simulation
PAPER SUBMITTED: 2018-05-11
PAPER REVISED: 2018-06-01
PAPER ACCEPTED: 2018-08-10
PUBLISHED ONLINE: 2019-04-14
DOI REFERENCE: https://doi.org/10.2298/TSCI180511131C
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 3, PAGES [1337 - 1343]
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Numerical simulation of the flow field structure of liquid nitrogen jet

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence