从微升体积加热井腔中蒸发的重于空气的碳氢化合物液体的蒸气云行为

IF 2.8 4区工程技术 Q2 ENGINEERING, MECHANICAL

Journal of Heat Transfer-transactions of The Asme Pub Date : 2023-09-30 DOI:10.1115/1.4063576

Digvijay Shukla, Pradipta Panigrahi

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引用次数: 0

摘要

井或储层上方的蒸汽云的详细特征在文献中是不可用的，尽管它有几个实际的重要性。本研究旨在了解从加热微升圆形储层蒸发的重于空气的蒸气云的蒸气云特征和气相输运。研究了重烃(环己烷)和相对较轻的流体(乙醇)的蒸发。数字全息干涉测量已被用于表征蒸汽云。用重量分析法测量了水库的蒸发速率。在加热和非加热储层中均观察到扁平的盘状蒸汽云。这是由于径向向外自然对流的存在。扩散模型在较高的格拉什夫数(即井加热)下低估了蒸发速率。界面附近以溶质对流为主，远离界面的区域热对流作用增强。摩尔分数分布取决于热格拉什夫数和溶质格拉什夫数的相对强度。在较轻的乙醇蒸气中，热对流效应比在环己烷蒸气中强。总的来说，本研究表明溶质对流对加热和未加热储层上方蒸汽云特征的主导作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Vapor Cloud Behaviour of Heavier-Than-Air Hydrocarbon Liquid Evaporating from a Microliter Volume Heated Well Cavity

Abstract Detailed characterization of the vapor cloud above a well or reservoir is not available in literature irrespective of its several practical importance. The present study aims to understand the vapor cloud characteristics and vapor phase transport of a heavier-than-air vapor cloud evaporating from a heated microliter circular reservoir. Evaporation of a heavy hydrocarbon (cyclohexane) and a comparatively lighter fluid (ethanol) is studied. Digital holographic interferometry has been used for the characterization of vapor cloud. Gravimetric analysis is used for measurement of evaporation rate from the reservoir. A flat disk-shaped vapor cloud is observed in both heated and non-heated reservoir cases. This is attributed to the presence of radial outward natural convection. The evaporation rate is underpredicted by the diffusion model at a higher Grashof number i.e. for well heating. Solutal convection dominates near the interface region and thermal convection effect increases in the region away from the liquid-vapor interface. The mole fraction profile depends on the relative strength of the thermal and solutal Grashof number. Thermal convection effect is stronger in lighter vapor of ethanol compared to that of cyclohexane. Overall, the present study shows dominance of solutal convection on the vapor cloud characteristics above both heated and unheated reservoir.

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来源期刊

Journal of Heat Transfer-transactions of The Asme 工程技术-工程：机械

自引率

0.00%

发文量

182

审稿时长

4.7 months

期刊介绍： Topical areas including, but not limited to: Biological heat and mass transfer; Combustion and reactive flows; Conduction; Electronic and photonic cooling; Evaporation, boiling, and condensation; Experimental techniques; Forced convection; Heat exchanger fundamentals; Heat transfer enhancement; Combined heat and mass transfer; Heat transfer in manufacturing; Jets, wakes, and impingement cooling; Melting and solidification; Microscale and nanoscale heat and mass transfer; Natural and mixed convection; Porous media; Radiative heat transfer; Thermal systems; Two-phase flow and heat transfer. Such topical areas may be seen in: Aerospace; The environment; Gas turbines; Biotechnology; Electronic and photonic processes and equipment; Energy systems, Fire and combustion, heat pipes, manufacturing and materials processing, low temperature and arctic region heat transfer; Refrigeration and air conditioning; Homeland security systems; Multi-phase processes; Microscale and nanoscale devices and processes.