Faculty Directory

Bar-Cohen, Avram

Bar-Cohen, Avram

Distinguished University Professor
Mechanical Engineering
2106B Glenn L. Martin Hall, Building 088


  • Ph.D., Massachusetts Institute of Technology, 1971


  • 1983 ASME Fellow
  • 1992 ASME Dedicated Service Award "for his work in Professional Development"
  • 1994 ASME Edwin F. Church Medal, "In recognition of contributions to engineering education, continuing education and professional development on both the national and international levels"
  • 1993 IEEE Fellow
  • 1994 ASME Electronic and Electrical Packaging Division, Outstanding Contribution Award "For outstanding contributions to application of Heat Transfer Science to Electronic Packaging"
  • 1994-1997 ASME Distinguished Lecturer
  • 1997 IEEE/Semi-Therm THERMI Significant Contributor Award "For his many contributions to the thermal management of semiconductors"
  • 1998 ASME/IEEE ITHERM Memorial Award "For significant contributions to the field of thermal and thermomechanical engineering for electronics packaging"
  • 1999 ASME Heat Transfer Memorial Award "For work contributing to a greater understanding of immersion cooling, pool boiling of dielectric fluids, and other aspects of electronics cooling"
  • 1999 ASME Curriculum Innovation Award, Board on Engineering Education, for "The Classroom of the Future: An Internet-Delivered National Course on Thermal Management of Electronics," (with S. Bhavnani and Y. Joshi)
  • 2000 ASME Worcester Reed Warner Medal, "..for outstanding contributions to the literature in the area of heat transfer, including more than 180 technical papers, and pioneering research and experimentation in electronic cooling and natural convection"
  • 2000 IEEE Distinguished Lecturer
  • 2002 IEEE CPMT Society, Outstanding Sustained Technical Contributions Award, "for contributions to thermal design, modeling, and analysis and for original research on ebullient and liquid-phase cooling"
  • 2007 ASME InterPack Achievement Award “for his long term and continued contributions in the field of Electronic and Photonic packaging”
  • 2007 ASME Honorary Member “for development of the scientific foundation for thermal management of electronic components and systems… and for seminal contributions and leadership in research, practice and education in the thermal management of micro and nanoelectronic systems”
  • 2008 Luikov Medal, International Center for Heat and Mass Transfer  “for outstanding contributions to the science and art of Heat and Mass Transfer and for activities in international scientific cooperation in conjunction with ICHMT programs”


ASME Activities

  • President, Assembly for International Heat Transfer Conferences(2010-2014)
  • Member, Executive Committee, Mechanical Engineering Department Heads Committee (2004-2008)
  • Member and Vice President, Assembly for International Heat Transfer Conferences (2002-2010)
  • Member, Steering Committee, Nanotechnology Institute, (2001-2004)
  • Vice-President for Research, Board on Research and Technology Development (1998-2001)
  • Chair of the US Scientific Committee of the International Heat Transfer Assembly (1998-2002)
  • Member, Executive Committee, Board on Research and Technology Development (1995-1998)
  • Chair (1981-1985), Member (1986- ) K-16 Committee for Heat Transfer in Electronic Equipment
  • Chair, BRTD Research Committee on Packaging and Physical Design of Electronic Equipment (1988-1990)
  • Secretary, BRTD Technical Opportunities and Planning Committee, (1989-1992)
  • Member, ASME Board on Professional Development (1989-1995)
  • Associate Editor, ASME Transactions Journal of Mechanical Design, (1978-1982)
  • Associate Editor, ASME Applied Mechanics Reviews, (1985-1991)

IEEE Activities

  • Member, IEEE/CPMT Board of Governors (2012-2015)
  • Editor-in-Chief of the IEEE/CPMT Transactions on Components and Packaging Technologies (1995-2009)
  • Member, IEEE/CPMT Board of Governors (1995-2005)
  • Vice-chairman of the IEEE/CHMT TC-9 Committee on Thermal Control (1990-1993)

Development and application of thermal science and engineering to silicon and compound semiconductor nanoelectronic and optoelectronic components Thermal design and optimization Ebullient heat transfer Two-phase flow in miniature channels Thermoelectric phenomena Conduction in anisotropic materials Polymer heat exchangers


  • Bar-Cohen, A. and P. Wang, 2012, “Thermal Management of On-Chip Hot Spots,” ASME Journal of Heat Transfer, DOI 10.1115/1.4005708
  • Cevallos, J.G., A.E. Bergles, A. Bar-Cohen, P. Rodgers, and S.K. Gupta, 2012, “Polymer heat exchangers - History, opportunities, and challenges,” Heat Transfer Engineering, DOI:10.1080/01457632.2012.663654; available on-line 3/9/2012


  • Rahim, E., R. Revellin, J.R. Thome, A. Bar-Cohen, 2011, “Characterization and Prediction of Two Phase Flow Regimes in Miniature Tubes,” International Journal of Multiphase Flow, Volume 37, Issue 1, Pages 12-23
  • Wang, P. and A. Bar-Cohen, 2011, “Self Cooling on Germanium Chip,” IEEE Transactions on Components and Packaging Technologies, Vol.1, No.5, pp.705-713
  • Arik, M., Kosar, A., Bostanci, H. and Bar-Cohen, A., 2011, “Pool Boiling Critical Heat Flux in Dielectric Liquids and Nano Fluids,” Advances in Heat Transfer – Vol 43, Cho and Green, Eds,  Elsevier
  • Bar-Cohen, A., Sheehan, J., Rahim, E., 2011, "Two-Phase Thermal Transport in Microgap Channels -  Theory, Experimental Results, and Predictive Relations," Microgravity - Science and Technology,  September 2011, pp. 1-15, DOI: 10.1007/s12217-011-9284-3
  • Khuu, V., M. Osterman, A. Bar-Cohen, and M. Pecht, 2011, “Considerations in the use of Thermal Flash Method for Thermal Measurements of Thermal Interface Materials,” IEEE CPMT Transactions, Vol 1, No. 7, pp 1015-1028
  • Song, Bong-Min,  B. Han, A. Bar-Cohen, M. Arik, R. Sharma, S. Weaver, 2011, “Life prediction of LED-based recess downlight cooled by synthetic jet,” Microelectronics Reliability, In Press, available on-line, May 2011  
  • Cevallos, J.,  S.K. Gupta, A. Bar-Cohen, 2011, “Incorporating moldability considerations during the design of thermally enhanced polymer heat exchangers,” ASME Journal of Mechanical Design, 133(8):081009, available on-line, August 2011
  • Kim, K.J., Avram Bar-Cohen, and Bongtae Han, 2011, “Thermal-Structural Modeling of Polymer Bragg Grating Waveguides Illuminated by a Light Emitting Diode,” Applied Optics, accepted for publication, posted on-line November 2011, Doc. ID 153737


  • Kim, D.W., E. Rahim, A. Bar-Cohen, B.T. Han, 2010, "Direct Submount Cooling of High Power LED’s," IEEE Transactions on Components and Packaging Technologies, Volume: 33  Issue:4, pp 698 – 712, DOI: 10.1109/TCAPT.2010.2040618  July 2009
  • Jang, C., B.M. Song, B. Han, A. Bar-Cohen, 2010, “Coupled Thermal and Thermo-mechanical Design Assessment of High Power Light Emitting Diode,” IEEE CPT Transactions, Vol 33, Issue 4, pp 688 – 697, DOI: 10.1109/TCAPT.2010.2044413 January 2010
  • Sher, I., B. Han, and A. Bar-Cohen, 2010, “Modified Coupled-Mode Model for Thermally Chirped Polymer Bragg Gratings,” Applied Optics, Vol 49, #11, pp 2066-2071.
  • Song, B.M. B.Han, A. Bar-Cohen, R. Sharma, M. Arik, 2010,"Hierarchical Life Prediction Model for Actively Cooled LED-Based Luminaire," Vol 33, Issue 4, pp 728 – 737, DOI: 10.1109/TCAPT.2010.2051034, May 2010
  • Luckow, P., A. Bar-Cohen, P. Rodgers, J. Cevallos, 2010, “Energy Efficient Polymers For Gas-    Liquid Heat Exchangers,” ASME JERT, Vol.132, Issue 2, DOI: 10.1115/1.4001568
  • Arik, M. and A. Bar-Cohen, 2010, Pool boiling of Perfluorocarbon Mixtures on Silicon Surfaces, Int. J. Heat Mass Transfer (2010), doi:10.1016/j.ijheatmasstransfer.2010.06.034
  • Litvinovitch, V., P. Wang, and A. Bar-Cohen, 2010 “Superlattice Tec Hot Spot Cooling,” IEEE Transactions on Components and Packaging Technologies, Volume: 33, Issue: 1, pp 229-239, DOI: 10.1109/TCAPT.2009.2032297
  • Kabov, O.A., D.V. Zaitsev, V.V. Cheverda, and A. Bar-Cohen, 2010, “Evaporation and flow dynamics of thin, shear-driven liquid films in microgap channels,” Experimental Thermal and Fluid Science, Vol 35, Issue 5, pp 825-831


  • Geisler, K.J. L., and  A. Bar-Cohen, 2009, “Confinement Effects on Nucleate Boiling and Critical Heat Flux in Buoyancy-Driven Microchannels,” Int. J. Heat Mass Transfer Vol 52, pp 2427–2436; doi:10.1016/j.ijheatmasstransfer.2009.02.001
  • Bar-Cohen, A., E. Rahim, 2009, “Modeling and Prediction of Two-Phase Microgap Channel Heat Transfer Characteristics,” Heat Transfer Engineering, Volume 30, Issue 8, pp 601-625
  • Wang, P., B. Yang, and A. Bar-Cohen, 2009, “Mini-Contact Enhanced Thermoelectric Coolers For On-Chip Hot Spot Cooling,” Heat Transfer Engineering, Vol 30, Issue 9, pp 736-743
  • Bar-Cohen, A. and P. Wang, 2009, "On Chip Hot Spot Remediation with Miniaturized    Thermoelectric Coolers", Microgravity Science and Technology, Volume 21, Issue 1, pp 351-362
  • Khuu, K., M. Osterman, A. Bar-Cohen, and M. Pecht, 2009, “Effects of Temperature Cycling and Elevated Temperature/Humidity on the Thermal Performance of Thermal Interface Materials,” IEEE Transactions on Device and Materials Reliability, Vol 9, Number 3, pp 379-391
  • Geisler, K.J.L.  and A. Bar-Cohen, 2009, “Passive Immersion Cooling of 3-D Stacked Dies,” IEEE Transactions on Components and Packaging Technologies, Vol 32 (3), pp. 557-565; doi: 10.1109/TCAPT.2008.2006186
  • Luckow, P., A. Bar-Cohen, P. Rodgers, 2009, “Minimum Mass Polymer Seawater Heat Exchanger for LNG Applications,” ASME TSEA, Vol 1, Issue 3, doi:10.1115/1.4001239.


  • Bar-Cohen, A., Han, B., and Kim, K.J., 2007, “Thermo-Optic Effects in Polymer Bragg Gratings,” Chapter 2, in Micro- and Optoelectronic Materials and Structures: Physics, Mechanics, Design, Reliability and Packaging, Y.C. Lee and E. Suhir, Editors, Springer, New York, pp. 65-111.


  • Bar-Cohen, A., Kraus, A.D., and Geisler, K., 2006, “Thermal Analysis and Design of Electronic Systems,” in RF and Microwave Handbook, M. Golio, Editor, CRC Press, Boca Raton, Florida.


  • Arik, M. and Bar-Cohen, A., 2003, "Effusivity-Based Correlation of Surface Property Effects in Pool Boiling CHF of Dielectric Liquids," International Journal of Heat and Mass Transfer, Vol. 46, pp 3755-3764.
  • Afgan, N., Carvalho, M. Prstic, S., Bar-Cohen, A., 2003, "Sustainability Assessment of Aluminum Heat Sink Design," Heat Transfer Engineering, 24 (4), pp 39-48.
  • Iyengar, M., and Bar-Cohen, A., 2003, "Least-Energy Optimization of Air-Cooled Heat Sinks for Sustainable Development," IEEE CPT Transactions, Vol. 26, No. 1, pp 16-25.
  • Narasimhan, S., Bar-Cohen, A., Nair, R., 2003, "Thermal Compact Modeling of Parallel Plate Heat Sinks," Vol. 26, Number 1, IEEE CPT Transactions, pp 136-146.
  • Narsimhan, S., Bar-Cohen, A., Nair, R., 2003, "Flow and Pressure Field Characteristics in the Porous Block Compact Modeling of Parallel Plate Heat Sinks," IEEE CPT Transactions, Vol. 26, No. 1, pp 147-157.
  • Bar-Cohen, A. , Iyengar, M, and Kraus, A.D., 2003, "Design of Optimum Plate Fin Natural Convection Heat Sinks," ASME Transactions - Journal of Electronic Packaging, Vol. 125, No. 2, pp 208-216.


  • Cardozo, R., Durfee, W., Ardichvili, A., Adams, C., Erdman, A., Hoey, M., Iaizzo, P., Mallick, D., Bar-Cohen, A., Beachy, R., Johnson, A., 2002, "Experiential Education In New Product Design and Business Development," accepted for publication, Journal of Product Innovation Management, Vol. 19, pp 4-17.
  • Yazawa, K., Solbrekken, G., and Bar-Cohen, A., 2002, "Modeling and Analysis of Heat Driven Forced Convection Cooling," Thermal Science & Engineering Vol. 10, No. 5, pp 29-36, Heat Transfer Society of Japan.
  • Bar-Cohen, A. and Iyengar, M., 2002, "Design and Optimization of Air-cooled Heat Sinks for Sustainable Development," IEEE CPT Transactions, Vol. 25, No. 4, pp 584-591.


  • Bar-Cohen, A., Celata, G.P., Klausner, J., Fujita, Y., Editors, 2000, "Boiling 2000: Phenomena and Emerging Applications," Vol. 1 & 2, (Proceedings UEF Conference, Anchorage, Alaska, May 2000), Begell House, NY, 2000.
  • Momoki, S., A. Bar-Cohen, and A.E. Bergles, 2000, "Estimation of Major Correlations for Frictional Pressure Drop in Gas-Liquid Two-Phase Flow in Horizontal Pipes Using Predicted Flow Regime Information," Multiphase Science and Technology, Vol. 12, Nos. 3&4, pp 161-175.


  • Bar-Cohen, A. and Kraus, A.D., Editors, 1999, Wiley Series in Thermal Management of Microelectronic and Electronic Systems: Incropera, F.P., "Liquid Cooling of Electronic Devices by Single-Phase Convection," John Wiley and Sons, Inc., New York.


  • Afgan, N., da Graca Carvalho, M., Bar-Cohen, A., Butterworth, D., and Roetzel, W., (editors), 1996, "New Developments in Heat Exchangers," Gordon and Breach Publishers, Australia.


  • Kraus, A. D. and Bar-Cohen, A. 1995, Design and Analysis of Heat Sinks, John Wiley and Sons, Inc., New York, (2nd printing 1997).

Bar-Cohen, Distinguished University Professor and Thermal Packaging Pioneer, Passes at 74

Mechanical Engineering Distinguished University Professor Avram Bar-Cohen helped lay the scientific foundations for the thermal management of electronics components.

Bar-Cohen Named President of IEEE Electronic Packaging Society

Professor Bar-Cohen began serving in this role January 1.

University of Maryland Sponsors ITHERM 2017 Conference

Professor Michael Ohadi is serving as General Chair of the conference organizing committee.

Gupta Named ASME Honorary Member

Distinguished University Professor Ashwani Gupta has been named a 2016 Honorary Member of ASME.

UMD Students Win Poster Session at NASA's Thermal and Fluids Analysis Workshop

Graduate students Allison Porter (Aerospace Engineering) and David Squiller (Mechanical Engineering) placed second and third at 2015 NASA TFAW poster session.

Bar-Cohen Featured in Applied Mechanics Reviews Podcast

Mechanical Engineering Professor Avram Bar-Cohen was interviewed by Applied Mechanics Review for ASME podcast.

Caleb Holloway Receives L-3 Communications Graduate Fellowship

Mechanical Engineering Graduate Student Caleb Holloway receives L-3 fellowship for 2013-2014.

Bar-Cohen Receives 2014 IEEE Components, Packaging and Manufacturing Technology Field Award

Mechanical Engineering professor recognized for pioneering contributions to thermal packaging of electronic components.

Bar-Cohen to Receive ASME 75th Anniversary Medal

Award recognizes professor’s service to heat transfer community.

"Embedded Cooling" of Next-Generation Power Electronics

UMD Research Team wins $2.1 million contract from DARPA to develop "embedded cooling" technology

Srivastava & Bar-Cohen Deliver Tutorial at SEMI-THERM29

Srivastava & Bar-Cohen teach attendees about microfluidic thermal management.

Shi and Srivastava win 2012 ISVLSI Best Paper Award

Bing Shi, an ECE graduate student, recieved accolades for her paper on hybrid and micro-fluidic cooling systems.

Bar-Cohen, Wang Research Paper Top 10 Downloaded at ASME Journal of Heat Transfer

“Thermal Management of On-Chip Hot Spots” among top 10 downloaded research papers in April, May.

New 3D-Printed Plastic Heat Exchanger Shows Complex Geometries Are Possible from Additive Manufacturing

Clark School engineers work with Stratasys to utilize fused deposition modeling technology in new application.

Bar-Cohen Elected to IEEE CMPT Board of Governors

Former Mechanical Engineering Department Chair will serve 3-year term as Member-at-Large

2011 InterPACK Conference Dedicated to Avi Bar-Cohen

Former ME Chair honored with dedication at ASME technical conference.

Avram Bar-Cohen to Step Down as ME Chair

After nine years, Professor Bar-Cohen resigns as chair of the department.

Hugh Bruck Appointed Director of Graduate Studies

ME professor to head graduate studies effective July 1.

Mechanical Engineering Graduate Student Receives Top Awards at the National Society of Black Engineers Convention

Sophoria Westmoreland recognized by NSBE for her research and professional achievements.

PI Holds 1st Annual Research Workshop

ME delegation travels to Abu Dhabi to promote research collaborations.

Wang Receives ASME Award

Post-doc recognized for his work on the Journal of Heat Transfer.

Avram Bar-Cohen Announced Recipient of Prestigious Luikov Medal

ME department chair recognized by ICHMT for contributions to the field of heat transfer and thermophysics.

Great Year for Terps Racing: Baja SAE

Team places in their year-end competitions.

ME Department Welcomes New Grad Students

Students benefit from graduate orientation.

Great Year for Terps Racing: Formula SAE

Team places in their year-end competitions.

Staff Member Recognized for 20 Years of Service

Lita Brown reflects on her 20+ years with ME department.

ME Staff Member Receives Award for 20 Years of Service

Juanita Irvin reflects back on 20 years with the university.

Ashwani K. Gupta Appointed Distinguished University Professor

Designation is the highest academic honor bestowed by the University of Maryland.

Energy Education and Research Collaboration Conducts First Workshop

Maryland faculty and Petroleum Institute review cooperation success of past year.

Salzberg Family Supports Scholarships

Fund assists mechanical engineering students, aids Great Expectations campaign.

Bar-Cohen Unanimously Elected Honorary Member of ASME

Distinguished membership recognizes lifetime service to engineering.

Dieters Establish Undergrad Scholarship

Former dean honors daughter, aids campaign with gift of $200,000.

Mechanical Engineering Recognizes Faculty Accomplishments

Edward B. Magrab honored at reception recognizing distinguished service to campus and department.

Cooperation with Korean University Adds to International Exchange

Pusan National University to share Ph.D. research knowledge, faculty and students.

Research Review Day Highlights Mechanical Engineering Research

Lecturers, graduate students showcase Maryland's innovation in energy conservation, biofluidics & reliability.

ME Faculty Honored at Research Leaders Luncheon

Nine ME Faculty honored on November 14.

CALCE-Hanyang University Cooperation Established

In June a cooperative relationship between CALCE and Hanyang University in Korea was officially sanctioned by the Korean Government.

ME Graduate Students Awarded

Mohammad Pour-gol-mohamad & Emil Rahim Recognized.

Michael Pecht to Receive 2006 Distinguished International Service Award

Congratulations to Professor Pecht for this outstanding recognition for the University and Department.

Mechanical Engineering Honors Prof. James Wallace & Faculty

Mechanical Engineering faculty were honored at the Faculty Recognition Event and Dinner on Friday, May 12.

Agreement Established with Abu Dhabi Petroleum Institute

Cooperation seeks to enhance collaborative educational and research activities in energy sciences.

ME Faculty Briefs

Chair and DUP of Mechanical Engineering Avram Bar-Cohen and Professor Bala Balachandran in the spotlight.

ME Faculty Collaborate with Korean Colleagues

Cooperation between Maryland and Hanyang develops faculty expertise.

First Hanyang University - UMD Workshop Held in Seoul, Korea

The first international workshop held at Hanyang University in Seoul, Korea on January 13, 2006.

Mosleh Awarded Nicole Jurie Kim Eminent Professorship

Ali Mosleh has been awarded the Nicole Jurie Kim Eminent Professorship in the A.J. Clark School of Engineering effective August 23, 2005.

Bar-Cohen Named Distinguished University Professor

Awards to be given at a convocation ceremony in the University’s Memorial Chapel on September 21, at 3 p.m.

ME Ph.D. Student, Chair Attend Exchange Conference in Russia

Bar-Cohen and Henry were among five pairings of American professors and their students sponsored by the NSF.

Maryland Nanotechnology Education, Research Ranked #1 in Trade Magazine

UMD ranks first in nanotechnology research and education according to the May/June 2005 issue of Small Times Magazine.

Maryland, U.S. Army Sign Test Center Agreement

Educational Partnership to Enhance MCART and Maryland Student Experience.


U.S. News & World Report “America’s Best Graduate Schools 2006” Releases Favorable 2005 Ranking Statistics.

Hugh Bruck Awarded Fulbright Scholarship at Tel Aviv University

Associate Professor Hugh A. Bruck was granted a Fulbright Scholar award in the 2005-2006 academic year.

Mechanical Engineering at Maryland Hosts Tsunami Science Forum

Forum Part of Greater Campus Tsunami Relief Day

Campus Honors Prof. David Holloway

Event honoring David Holloway was held the evening of October 30.

Bar-Cohen Delivers Southwest Mechanics Lecture

Professor and Chair of Mechanical Engineering Avram Bar-Cohen, is selected to participate in the prestigious Southwest Mechanics Lecture Series (SWMLS).

Avanced "Combined Heat and Power" System Demo and Dedication at the University of Maryland

The CEEE at the University of Maryland demonstrated an advanced combined heat and power (CHP) system on September 9, 2004.

Mechanical Engineering Undergraduate Program Ranks 23rd in USNWR Release

U.S. News & World Report “America’s Best Colleges 2005” Releases Favorable 2004 Ranking Statistics.


Numerous outstanding faculty awards and accomplishments in the Department of ME announced.


U.S. News & World Report “America’s Best Graduate Schools 2005” Releases Favorable 2004 Ranking Statistics.


Provost from Hangyang University in Korea Visits UMD to Foster Collaboration with ME Department.

Mechanical Engineering Student Awards Announced

The Department of ME is pleased to announce the winners of the Spring 2003 Student Awards.

Maryland's Tau Mu Chapter hosts 82nd National Pi Tau Sigma Convention

UMD's Tau Mu Chapter hosted the 82nd National Pi Tau Sigma Convention on the weekend of February 21-23, 2003.

ME Lab Presents Workshop on Thermal Packaging of High Flux Military and Commercial Electronics

This highly successful workshop's main charge was to identify the next round of emerging technologies in thermal management of high flux electronics.

ME Department Co-Sponsors Biosensor Symposium

The Symposium, held at the FDA in College Park brought together local biosensor researchers for exchange of information and ideas.

Avram Bar-Cohen Honored by IEEE

Dr. Bar-Cohen received the Outstanding Sustained Technical Contribution Award for his many contributions in the area of thermal management.

Pi Tau Sigma Initiates New Members

Pi Tau Sigma student chapter, prepare to host the National Convention on the UMD campus in February of 2003.

Industrial College of the Armed Forces Students Visit

The students were hosted by Assoc. Prof. Jeffrey Herrmann and were welcomed by Department Chairman Avram Bar-Cohen.

A Celebration of Dave Anand's 10 Years as Chairman

Faculty and friends from the Department all shared memories, stories, and photo posters of Dr. Anand.

University of Minnesota's Dr. Avram Bar-Cohen Named New Department Chair

Professor Avram Bar-Cohen of the University of Minnesota has been named Chairperson of the Department of Mechanical Engineering.

American Society of Mechanical Engineers (ASME)

Institute of Electrical and Electronics Engineers (IEEE)