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Thermal and solutal Marangoni convection in three-layered viscous flows:Insights for liquid metal battery optimization
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作者 SHAHEEN Sidra HUANG Hu-lin +2 位作者 ARAIN Muhammad Bilal BHATTI Muhammad Mubashir KHALIQUE Chaudry Masood 《Journal of Central South University》 2025年第6期2087-2100,共14页
This study examines the intricate occurrences of thermal and solutal Marangoni convection in three-layered flows of viscous fluids,with a particular emphasis on their relevance to renewable energy systems.This researc... This study examines the intricate occurrences of thermal and solutal Marangoni convection in three-layered flows of viscous fluids,with a particular emphasis on their relevance to renewable energy systems.This research examines the flow of a three-layered viscous fluid,considering the combined influence of heat and solutal buoyancy driven Rayleigh-Bénard convection,as well as thermal and solutal Marangoni convection.The homotopy perturbation method is used to examine and simulate complex fluid flow and transport phenomena,providing important understanding of the fundamental physics and assisting in the optimization of various battery configurations.The inquiry examines the primary elements that influence Marangoni convection and its impact on battery performance,providing insights on possible enhancements in energy storage devices.The findings indicate that the velocity profiles shown graphically exhibit a prominent core zone characterized by the maximum speed,which progressively decreases as it approaches the walls of the channel.This study enhances our comprehension of fluid dynamics and the transmission of heat and mass in intricate systems,which has substantial ramifications for the advancement of sustainable energy solutions. 展开更多
关键词 viscous fluid three-layered closed geometries electrical conductivity thermal convection solutal convection mass diffusivity homotopy perturbation methods
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上盖棉被下铺毛毯最保暖
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《农村新技术》 2024年第1期68-68,共1页
如果家里有棉被和毛毯,冬天怎么盖才最保暖呢?盖被子的顺序对保暖效果是有影响的:上盖棉被、下铺毛毯的“夹心盖法”最为保暖;其次是先盖一层棉被,再在棉被上盖一层毛毯;先盖毛毯,再盖棉被不如前两者暖和。专家分析:人体在不断散发热量... 如果家里有棉被和毛毯,冬天怎么盖才最保暖呢?盖被子的顺序对保暖效果是有影响的:上盖棉被、下铺毛毯的“夹心盖法”最为保暖;其次是先盖一层棉被,再在棉被上盖一层毛毯;先盖毛毯,再盖棉被不如前两者暖和。专家分析:人体在不断散发热量,如果热量扩散得太快会觉得很冷,控制扩散的速度,则能起到保暖作用。棉被和毛毯其实都有蓄热效果,所以身下铺毛毯、上面盖被子,可以达到上下双重锁温的效果。如果先盖被子再在上面盖毯子,也会很保暖,是因为被子比较蓬松。 展开更多
关键词 保暖效果 棉被 被子 毛毯 热量扩散
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超高压含硫气井井筒内天然气水合物解堵技术 被引量:13
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作者 杨健 冯莹莹 +2 位作者 张本健 唐永帆 蒋泽银 《天然气工业》 EI CAS CSCD 北大核心 2020年第9期64-69,共6页
为了安全、高效、经济地解除超高压气井井筒中的天然气水合物(以下简称水合物)堵塞,利用自主研发的固体自生热解堵剂在井筒内发生化学反应所释放出的热量来溶解水合物并防止其再次生成,通过调节解堵剂加量,来实现生热时间和生热量可调,... 为了安全、高效、经济地解除超高压气井井筒中的天然气水合物(以下简称水合物)堵塞,利用自主研发的固体自生热解堵剂在井筒内发生化学反应所释放出的热量来溶解水合物并防止其再次生成,通过调节解堵剂加量,来实现生热时间和生热量可调,进而将形成的化学自生热解堵技术在四川盆地超高压含硫气井的解堵作业中进行了应用。研究结果表明:①采用自主研发的固体化学自生热解堵剂,通过调整加量,可以实现生热峰值温度(34.2~88.5℃)、生热时间(24.2~884.0 min)可调,并且反应产物中包含有水合物抑制剂,能够抑制水合物再次生成;②随着解堵剂浓度增大,热传递速率加快,使解堵剂周围水合物的分解速率增加;③随着井筒内径增大,解堵时间延长,并且从64 mm增至76 mm对应的解堵时间增长率小于从76 mm增至102 mm对应的解堵时间增长率;④热量扩散模拟计算结果与现场实际用量的吻合率超过85%,证明所建立的化学自生热解堵剂热量扩散模型可靠,可以用于现场解堵剂加量的计算;⑤使用抗硫耐压140 MPa的固体药剂投加装置投加固体自生热解堵剂,在四川盆地超高压含硫气井已应用3井次,成功解除了水合物堵塞,使气井顺利恢复生产。结论认为,所形成的解堵技术针对超高压含硫气井井筒中形成的水合物堵塞的解除效果好、现场操作安全简单、费用低,具有较好的应用前景。 展开更多
关键词 超高压气井 H2S 天然气水合物 堵塞 自生热 解堵剂 热量扩散模拟
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Variable mass and thermal properties in three-dimensional viscous flow: Application of Darcy law 被引量:4
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作者 Iffat JABEEN Muhammad FAROOQ Nazir A. MIR 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第5期1271-1282,共12页
This article concentrates on the properties of three-dimensional magneto-hydrodynamic flow of a viscous fluid saturated with Darcy porous medium deformed by a nonlinear variable thickened surface.Analysis of flow is d... This article concentrates on the properties of three-dimensional magneto-hydrodynamic flow of a viscous fluid saturated with Darcy porous medium deformed by a nonlinear variable thickened surface.Analysis of flow is disclosed in the neighborhood of stagnation point.Features of heat transport are characterized with Newtonian heating and variable thermal conductivity.Mass transport is carried out with first order chemical reaction and variable mass diffusivity.Resulting governing equations are transformed by implementation of appropriate transformations.Analytical convergent series solutions are computed via homotopic technique.Physical aspects of numerous parameters are discussed through graphical data.Drag force coefficient,Sherwood and Nusselt numbers are illustrated through graphs corresponding to various pertinent parameters.Graphical discussion reveals that conjugate and constructive chemical reaction parameters enhance the temperature and concentration distributions,respectively. 展开更多
关键词 Newtonian heating chemical reaction variable mass diffusivity Darcy law
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