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Author

Anthony M. Jacobi

Other affiliations: Johns Hopkins University, Purdue University, Ford Motor Company  ...read more
Bio: Anthony M. Jacobi is an academic researcher from University of Illinois at Urbana–Champaign. The author has contributed to research in topic(s): Heat transfer & Heat exchanger. The author has an hindex of 49, co-authored 273 publication(s) receiving 9255 citation(s). Previous affiliations of Anthony M. Jacobi include Johns Hopkins University & Purdue University.
Papers
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Journal ArticleDOI
Abstract: A three-zone flow boiling model is proposed to describe evaporation of elongated bubbles in microchannels. The heat transfer model describes the transient variation in local heat transfer coefficient during the sequential and cyclic passage of (i) a liquid slug, (ii) an evaporating elongated bubble and (iii) a vapor slug. A time-averaged local heat transfer coefficient is thus obtained. The new model illustrates the importance of the strong cyclic variation in the heat transfer coefficient and the strong dependency of heat transfer on the bubble frequency, the minimum liquid film thickness at dryout and the liquid film formation thickness.

534 citations


Journal Article
Abstract: Reference LTCM-ARTICLE-2005-021View record in Web of Science Record created on 2005-07-06, modified on 2017-05-10

526 citations


Journal ArticleDOI
Anthony M. Jacobi1, Ramesh K. Shah2Institutions (2)
Abstract: Flow through an interrupted or enhanced heat exchanger passage is complicated and may cause the natural formation f vortices that can enhance local heat transfer by several hundred percent. Vortex-induced heat transfer enhancement exploits this effect through the deliberate generation of large-scale lonitudinal vortices in the flow. In this review of vortex-induced heat transfer enhancement, the theoretical basis for the method is discussed and both active and passive implementations are reviewed. The aim of this survey is to critically review recent progress and to identify research needs in the area of vortex-induced heat exchanger enhancement.

400 citations



Journal ArticleDOI
T.a. Rush1, Ty A. Newell1, Anthony M. Jacobi1Institutions (1)
Abstract: Local heat transfer and flow behavior are investigated for laminar and transitional flows in sinusoidal wavy passages. The experimental geometry consists of a channel with a 10 : 1 aspect ratio bound by two wavy walls. The walls are from 12 to 14 wavelengths long, and the wave amplitude, phase angle, and wall-to-wall spacing are varied during the experiments. Using visualization methods, the flow field is characterized as steady or unsteady, with special attention directed toward detecting the onset of macroscopic mixing in the flow. The location of the onset of mixing is found to depend on the Reynolds number and channel geometry. Instabilities are manifest near the channel exit at low Reynolds numbers (Re ∼200) and move toward the channel entrance as the Reynolds number is increased; the entire channel exhibits unsteady, macroscopic mixing at moderate Reynolds numbers (Re ∼800) . The onset of macroscopic mixing is directly linked to significant increases in local heat transfer.

262 citations


Cited by
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Book
01 Jan 1971-
Abstract: 1: Magnetic Particles: Preparation, Properties and Applications: M. Ozaki. 2: Maghemite (gamma-Fe2O3): A Versatile Magnetic Colloidal Material C.J. Serna, M.P. Morales. 3: Dynamics of Adsorption and Oxidation of Organic Molecules on Illuminated Titanium Dioxide Particles Immersed in Water M.A. Blesa, R.J. Candal, S.A. Bilmes. 4: Colloidal Aggregation in Two-Dimensions A. Moncho-Jorda, F. Martinez-Lopez, M.A. Cabrerizo-Vilchez, R. Hidalgo Alvarez, M. Quesada-PMerez. 5: Kinetics of Particle and Protein Adsorption Z. Adamczyk.

1,868 citations


Journal ArticleDOI
Zhidong Han1, Alberto Fina2Institutions (2)
Abstract: Thermally conductive polymer composites offer new possibilities for replacing metal parts in several applications, including power electronics, electric motors and generators, heat exchangers, etc., thanks to the polymer advantages such as light weight, corrosion resistance and ease of processing. Current interest to improve the thermal conductivity of polymers is focused on the selective addition of nanofillers with high thermal conductivity. Unusually high thermal conductivity makes carbon nanotube (CNT) the best promising candidate material for thermally conductive composites. However, the thermal conductivities of polymer/CNT nanocomposites are relatively low compared with expectations from the intrinsic thermal conductivity of CNTs. The challenge primarily comes from the large interfacial thermal resistance between the CNT and the surrounding polymer matrix, which hinders the transfer of phonon dominating heat conduction in polymer and CNT. This article reviews the status of worldwide research in the thermal conductivity of CNTs and their polymer nanocomposites. The dependence of thermal conductivity of nanotubes on the atomic structure, the tube size, the morphology, the defect and the purification is reviewed. The roles of particle/polymer and particle/particle interfaces on the thermal conductivity of polymer/CNT nanocomposites are discussed in detail, as well as the relationship between the thermal conductivity and the micro- and nano-structure of the composites.

1,776 citations


Journal ArticleDOI
Abstract: Educators, researchers, and policy makers have advocated student involvement for some time as an essential aspect of meaningful learning. In the past twenty years engineering educators have implemented several means of better engaging their undergraduate students, including active and cooperative learning, learning communities, service learning, cooperative education, inquiry and problem-based learning, and team projects. This paper focuses on classroom-based pedagogies of engagement, particularly cooperative and problem-based learning. It includes a brief history, theoretical roots, research support, summary of practices, and suggestions for redesigning engineering classes and programs to include more student engagement. The paper also lays out the research ahead for advancing pedagogies aimed at more fully enhancing students’ involvement in their learning.

1,291 citations


Journal ArticleDOI
Alan R. Jones1Institutions (1)
01 Mar 1970-Sigplan Notices

1,147 citations


01 Jan 1992-
Abstract: To improve the performance of particle image velocimetry in measuring instantaneous velocity fields, direct cross-correlation of image fields can be used in place of auto-correlation methods of interrogation of double- or multiple-exposure recordings. With improved speed of photographic recording and increased resolution of video array detectors, cross-correlation methods of interrogation of successive single-exposure frames can be used to measure the separation of pairs of particle images between successive frames. By knowing the extent of image shifting used in a multiple-exposure and by a priori knowledge of the mean flow-field, the cross-correlation of different sized interrogation spots with known separation can be optimized in terms of spatial resolution, detection rate, accuracy and reliability.

1,101 citations


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Performance
Metrics

Author's H-index: 49

No. of papers from the Author in previous years
YearPapers
20211
20202
20195
20187
20177
20167