Basic Study on the Relationship between Heat Transfer and Fluid Flow of Magnetic Functional Fluid

磁功能流体传热与流体流动关系的基础研究

• 批准号: 23760162
• 负责人: MOTOZAWA Masaaki
• 金额: $ 2.83万
• 依托单位: Tokyo University of Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23760162/
• 关键词: 磁気機能性ナノ流体; 磁性流体; 強制対流熱伝達; 伝熱促進; UVP; 流体工学; ＵＶＰ; 流動抵抗

Relationship between heat transfer and fluid flow of a magnetic fluid under magnetic field was investigated experimentally. Experiments were performed in both laminar flow and turbulent flow. Uniform or non-uniform magnetic field were applied to magnetic fluid flow with changing magnetic field intensity, magnetic field direction and so on. Moreover, in order to better understand heat transfer phenomena of this research, the velocity distribution of the magnetic fluid flow was measured by the Ultrasonic Velocity Profile (UVP) method. The results show that in the case of laminar flow, heat transfer was locally enhanced by applying magnetic field in the region where the magnetic field exists. This enhancement of heat transfer under the uniform magnetic field is larger than that under the non-uniform magnetic field. According to the results of the velocity distribution measurements, it seems that these heat transfer enhancements were caused by different mechanism between applying uniform magnetic field and applying non-uniform magnetic field. In addition, since flow resistance increases by applying magnetic field, the relationship between heat transfer enhancement and increment of flow resistance was evaluated.

实验研究了磁场作用下磁性流体的流动与传热的关系。实验在层流和湍流两种情况下进行。通过改变磁场强度、磁场方向等，对磁性流体流动施加均匀或非均匀磁场，并采用超声速度剖面法（UVP）测量磁性流体流动的速度分布，以更好地了解本研究中的传热现象。结果表明，在层流情况下，在磁场存在的区域施加磁场，局部强化了传热。均匀磁场对传热的强化作用大于非均匀磁场。根据速度分布的测量结果，这似乎是由于施加均匀磁场和施加非均匀磁场的不同机制引起的这些传热增强。此外，由于流动阻力增加，通过施加磁场，传热增强和流动阻力的增量之间的关系进行了评估。

项目成果

非一様磁場下における磁性流体強制対流熱伝達の伝熱特性に関する研究

非均匀磁场下磁流体强制对流换热传热特性研究

• 发表时间: 2013
• 作者: M. Motozawa;J. Chang;T. Sawada and Y. Kawaguchi;辰野誠哉
• 通讯作者: 辰野誠哉

Characteristic velocity distribution of rectangular duct flow of a magnetic fluid under magnetic field

磁场作用下磁性流体矩形管流特征速度分布

• 发表时间: 2012
• 作者: M. Motozawa;J. Chang;T. Sawada and Y. Kawaguchi;辰野誠哉;M. Motozawa
• 通讯作者: M. Motozawa

Variation of Forced Convective Heat Transfer in Rectangular Duct Flow of a Magnetic Fluid under Magnetic Field

磁场作用下磁流体矩形管流强制对流传热的变化

• DOI: 10.1088/1742-6596/412/1/012025
• 发表时间: 2013
• 期刊: Journal of Physics: Conference Series
• 作者: M. Motozawa;T. Sekine;T. Sawada and Y. Kawaguchi
• 通讯作者: T. Sawada and Y. Kawaguchi

磁性流体の矩形管内強制対流熱伝達と流動に及ぼす磁場の影響

磁场对磁流体矩形管内强制对流换热和流动的影响

• 发表时间: 2011
• 作者: Osamu TERASHIMA;Yasuhiko SAKAI;Kouji NAGATA;本澤政明，常佳，澤田達男，川口靖夫
• 通讯作者: 本澤政明，常佳，澤田達男，川口靖夫

Springer, Ultrasonic Doppler velocity profiler for fluid flow, Springer

Springer，用于流体流动的超声波多普勒速度剖面仪，Springer

• 发表时间: 2012
• 作者: M. Motozawa;J. Chang;T. Sekine;T. Sawada and Y. Kawaguchi;Itsuo Hanasaki and Yoshitada Isono;加藤学,高橋勉;杉山智哉,後藤俊幸,渡邊威;Y. Takeda (Editor) et al
• 通讯作者: Y. Takeda (Editor) et al