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Gregory J. Michna
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Proceedings Papers

Thermal Conductivity of Advanced 3D Printed Polymers

Cory Jacques, Todd Letcher, Gregory J. Michna
Proc. ASME. HT2024, ASME 2024 Heat Transfer Summer Conference, V001T02A004, July 15–17, 2024
Publisher: American Society of Mechanical Engineers
Paper No: HT2024-130686
https://doi.org/10.1115/HT2024-130686
View Paper titled, Thermal Conductivity of Advanced 3D Printed Polymers
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Topics: Additive manufacturing, Polymers, Thermal conductivity
Proceedings Papers

The Effects of 3D Printing Parameters and Surface Roughness on Convective Heat Transfer Performance

Lucas Pereira, Todd Letcher, Gregory J. Michna
Proc. ASME. HT2019, ASME 2019 Heat Transfer Summer Conference, V001T13A011, July 14–17, 2019
Publisher: American Society of Mechanical Engineers
Paper No: HT2019-3591
https://doi.org/10.1115/HT2019-3591
View Paper titled, The Effects of 3D Printing Parameters and Surface Roughness on Convective Heat Transfer Performance
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Topics: Additive manufacturing, Convection, Surface roughness, Heat transfer coefficients, Reynolds number, Extruding, Heat exchangers, Heat sinks, Manufacturing, Polymers
Proceedings Papers

Thermal Conductivity Testing Apparatus for 3D Printed Materials

Tiffaney Flaata, Gregory J. Michna, Todd Letcher
Proc. ASME. HT2017, Volume 2: Heat Transfer Equipment; Heat Transfer in Multiphase Systems; Heat Transfer Under Extreme Conditions; Nanoscale Transport Phenomena; Theory and Fundamental Research in Heat Transfer; Thermophysical Properties; Transport Phenomena in Materials Processing and Manufacturing, V002T15A006, July 9–12, 2017
Publisher: American Society of Mechanical Engineers
Paper No: HT2017-4856
https://doi.org/10.1115/HT2017-4856
View Paper titled, Thermal Conductivity Testing Apparatus for 3D Printed Materials
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Topics: Additive manufacturing, Testing, Thermal conductivity, Polymer composites, Heat exchangers, Heat transfer, Metals, Polymers, Brass (Metal), Bronze
Proceedings Papers

Reducing Crossflow Effects in Arrays of Impinging Jets

Nicholas R. Arens, Mitchell P. Morem, Jeffrey Doom, Gregory J. Michna
Proc. ASME. HT2017, Volume 1: Aerospace Heat Transfer; Computational Heat Transfer; Education; Environmental Heat Transfer; Fire and Combustion Systems; Gas Turbine Heat Transfer; Heat Transfer in Electronic Equipment; Heat Transfer in Energy Systems, V001T08A007, July 9–12, 2017
Publisher: American Society of Mechanical Engineers
Paper No: HT2017-4849
https://doi.org/10.1115/HT2017-4849
View Paper titled, Reducing Crossflow Effects in Arrays of Impinging Jets
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Topics: Jets, Heat transfer, Nozzles, Computational fluid dynamics, Flow (Dynamics), Fluids, Microelectronic devices, Simulation, Thermal management, Additive manufacturing
Proceedings Papers

Oscillating Heat Pipe Performance With Modified Evaporator Geometries

Mitchell P. Hoesing, Gregory J. Michna
Proc. ASME. ICNMM2016, ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels, V001T05A003, July 10–14, 2016
Publisher: American Society of Mechanical Engineers
Paper No: ICNMM2016-7980
https://doi.org/10.1115/ICNMM2016-7980
View Paper titled, Oscillating Heat Pipe Performance With Modified Evaporator Geometries
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Topics: Heat pipes, Cavities, Condensers (steam plant), Cooling, Heat transfer, Thermal energy, Drying, Fluids, Geometry, Heat
Proceedings Papers

Investigation of Fast Pyrolysis of Camelina Sativa Meal in an Auger Reactor

Evan R. Almberg, Gregory J. Michna, Stephen P. Gent
Proc. ASME. ES2016, Volume 1: Biofuels, Hydrogen, Syngas, and Alternate Fuels; CHP and Hybrid Power and Energy Systems; Concentrating Solar Power; Energy Storage; Environmental, Economic, and Policy Considerations of Advanced Energy Systems; Geothermal, Ocean, and Emerging Energy Technologies; Photovoltaics; Posters; Solar Chemistry; Sustainable Building Energy Systems; Sustainable Infrastructure and Transportation; Thermodynamic Analysis of Energy Systems; Wind Energy Systems and Technologies, V001T02A007, June 26–30, 2016
Publisher: American Society of Mechanical Engineers
Paper No: ES2016-59601
https://doi.org/10.1115/ES2016-59601
View Paper titled, Investigation of Fast Pyrolysis of Camelina Sativa Meal in an Auger Reactor
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Topics: Augers, Pyrolysis, Temperature, Condensers (steam plant), Feedstock, Biomass, Bombs, Rheology, Vapors, Water
Proceedings Papers

Geometric Evaporator Enhancements of an Oscillating Heat Pipe

Mitchell P. Hoesing, Gregory J. Michna
Proc. ASME. ICNMM2015, ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels, V001T07A002, July 6–9, 2015
Publisher: American Society of Mechanical Engineers
Paper No: ICNMM2015-48440
https://doi.org/10.1115/ICNMM2015-48440
View Paper titled, Geometric Evaporator Enhancements of an Oscillating Heat Pipe
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Topics: Heat pipes, Cooling, Pins (Engineering), Cavities, Computer cooling, Condensers (steam plant), Fluid dynamics, Fluids, Geometry, Heat
Proceedings Papers

Start-Up and Transient Behavior of an Oscillating Heat Pipe

Sagar Babu Paudel, Gregory J. Michna
Proc. ASME. ICNMM2015, ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels, V001T07A001, July 6–9, 2015
Publisher: American Society of Mechanical Engineers
Paper No: ICNMM2015-48438
https://doi.org/10.1115/ICNMM2015-48438
View Paper titled, Start-Up and Transient Behavior of an Oscillating Heat Pipe
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Topics: Heat pipes, Transients (Dynamics), Methanol, Fluids, Temperature, Heat, Stress, Water, Cooling, Electronics
Proceedings Papers

Investigation of Fast Pyrolysis of Brassica Carinata in an Auger Type Reactor

William D. Sonnek, Stephen P. Gent, Gregory J. Michna
Proc. ASME. ES2015, Volume 1: Advances in Solar Buildings and Conservation; Climate Control and the Environment; Alternate Fuels and Infrastructure; ARPA-E; Combined Energy Cycles, CHP, CCHP, and Smart Grids; Concentrating Solar Power; Economic, Environmental, and Policy Aspects of Alternate Energy; Geothermal Energy, Harvesting, Ocean Energy and Other Emerging Technologies; Hydrogen Energy Technologies; Low/Zero Emission Power Plants and Carbon Sequestration; Micro and Nano Technology Applications and Materials, V001T02A002, June 28–July 2, 2015
Publisher: American Society of Mechanical Engineers
Paper No: ES2015-49376
https://doi.org/10.1115/ES2015-49376
View Paper titled, Investigation of Fast Pyrolysis of Brassica Carinata in an Auger Type Reactor
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Topics: Augers, Pyrolysis, Temperature, Condensers (steam plant), Oils, Petroleum, Water, Biomass, Bombs, Rheology
Proceedings Papers

Effect of Inclination Angle on Pulsating Heat Pipe Performance

Sagar Babu Paudel, Gregory J. Michna
Proc. ASME. ICNMM2014, ASME 2014 12th International Conference on Nanochannels, Microchannels and Minichannels, V001T05A006, August 3–7, 2014
Publisher: American Society of Mechanical Engineers
Paper No: ICNMM2014-22016
https://doi.org/10.1115/ICNMM2014-22016
View Paper titled, Effect of Inclination Angle on Pulsating Heat Pipe Performance
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Topics: Heat pipes, Flux (Metallurgy), Heat, Thermal resistance, Computer cooling, Construction, Copper, Heat transfer, Microelectronic devices, Pressure
Proceedings Papers

Integration of a Pulsating Heat Pipe in a Flat Plate Heat Sink

Mitchell P. Hoesing, Gregory J. Michna
Proc. ASME. ICNMM2014, ASME 2014 12th International Conference on Nanochannels, Microchannels and Minichannels, V001T05A001, August 3–7, 2014
Publisher: American Society of Mechanical Engineers
Paper No: ICNMM2014-21233
https://doi.org/10.1115/ICNMM2014-21233
View Paper titled, Integration of a Pulsating Heat Pipe in a Flat Plate Heat Sink
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Topics: Flat plates, Heat pipes, Heat sinks, Condensers (steam plant), Fluids, Thermal resistance, Water, Aluminum, Aluminum plate, Design
Proceedings Papers

Properties of Brassica Carinata and Camelina Sativa Meals and Fast Pyrolysis Derived Bio-Oils

John Harris, James Lawburgh, Brian Lawburgh, Gregory J. Michna, Stephen P. Gent
Proc. ASME. ES2014, Volume 2: Economic, Environmental, and Policy Aspects of Alternate Energy; Fuels and Infrastructure, Biofuels and Energy Storage; High Performance Buildings; Solar Buildings, Including Solar Climate Control/Heating/Cooling; Sustainable Cities and Communities, Including Transportation; Thermofluid Analysis of Energy Systems, Including Exergy and Thermoeconomics, V002T04A003, June 30–July 2, 2014
Publisher: American Society of Mechanical Engineers
Paper No: ES2014-6387
https://doi.org/10.1115/ES2014-6387
View Paper titled, Properties of Brassica Carinata and Camelina Sativa Meals and Fast Pyrolysis Derived Bio-Oils
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Topics: Oils, Petroleum, Pyrolysis, Biomass, Bombs, Calorimetry, Feedstock, Fluidized beds, Particle size, Particulate matter
Proceedings Papers

Effect of Condenser Temperature on Pulsating Heat Pipe Performance

Nick Hansen, John VerSteeg, Gregory J. Michna
Proc. ASME. HT2013, Volume 2: Heat Transfer Enhancement for Practical Applications; Heat and Mass Transfer in Fire and Combustion; Heat Transfer in Multiphase Systems; Heat and Mass Transfer in Biotechnology, V002T04A019, July 14–19, 2013
Publisher: American Society of Mechanical Engineers
Paper No: HT2013-17457
https://doi.org/10.1115/HT2013-17457
View Paper titled, Effect of Condenser Temperature on Pulsating Heat Pipe Performance
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Topics: Condensers (steam plant), Heat pipes, Temperature, Electrical components, Fluids, Heat, Heat flux, Thermal management, Thermal resistance, Vapor pressure
Proceedings Papers

Operational Temperature Ranges in Pulsating Heat Pipes

Nick Hansen, Gregory J. Michna
Proc. ASME. IMECE2012, Volume 7: Fluids and Heat Transfer, Parts A, B, C, and D, 1449-1456, November 9–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2012-88008
https://doi.org/10.1115/IMECE2012-88008
View Paper titled, Operational Temperature Ranges in Pulsating Heat Pipes
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Topics: Heat pipes, Temperature, Heat, Computer cooling, Condensers (steam plant), Design, Energy dissipation, Heat sinks, Steady state
Proceedings Papers

Study of CHF Condition for Flow Boiling of R134a in Circular Microchannels

Saptarshi Basu, Sidy Ndao, Gregory J. Michna, Yoav Peles, Michael K. Jensen
Proc. ASME. IHTC14, 2010 14th International Heat Transfer Conference, Volume 1, 415-425, August 8–13, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IHTC14-22661
https://doi.org/10.1115/IHTC14-22661
View Paper titled, Study of CHF Condition for Flow Boiling of R134a in Circular Microchannels
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Topics: Boiling, Critical heat flux, Flow (Dynamics), Heart failure, Microchannels, Subcooling, Vapors, Flux (Metallurgy), Pressure
Proceedings Papers

Heat Transfer Characteristics of Flow Boiling of R134a in Uniformly Heated Horizontal Circular Microtubes

Saptarshi Basu, Sidy Ndao, Gregory J. Michna, Yoav Peles, Michael K. Jensen
Proc. ASME. IHTC14, 2010 14th International Heat Transfer Conference, Volume 1, 385-396, August 8–13, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IHTC14-22656
https://doi.org/10.1115/IHTC14-22656
View Paper titled, Heat Transfer Characteristics of Flow Boiling of R134a in Uniformly Heated Horizontal Circular Microtubes
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Topics: Boiling, Flow (Dynamics), Heat transfer, Heat transfer coefficients, Flux (Metallurgy), Heat flux, Pressure, Vapors, Errors, Heat
Proceedings Papers

Exploration of Experimental Techniques to Determine the Condensation Heat Flux in Microchannels and Minichannels

Melanie M. Derby, Hee Joon Lee, Rose C. Craft, Gregory J. Michna, Yoav Peles, Michael K. Jensen
Proc. ASME. IHTC14, 2010 14th International Heat Transfer Conference, Volume 2, 169-176, August 8–13, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IHTC14-22647
https://doi.org/10.1115/IHTC14-22647
View Paper titled, Exploration of Experimental Techniques to Determine the Condensation Heat Flux in Microchannels and Minichannels
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Topics: Condensation, Heat flux, Microchannels, Sensors, Copper, Heat, Heat transfer coefficients, Thermoelectric coolers, Experimental methods, Heat transfer
Journal Articles

Flow Boiling of R134a in Circular Microtubes—Part I: Study of Heat Transfer Characteristics

Saptarshi Basu, Sidy Ndao, Gregory J. Michna, Yoav Peles, Michael K. Jensen
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. May 2011, 133(5): 051502.
https://doi.org/10.1115/1.4003159
Published Online: February 3, 2011
View Article titled, Flow Boiling of R134a in Circular Microtubes—Part I: Study of Heat Transfer Characteristics
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Topics: Boiling, Flow (Dynamics), Heat transfer, Heat transfer coefficients, Heat flux, Vapors
Journal Articles

Flow Boiling of R134a in Circular Microtubes—Part II: Study of Critical Heat Flux Condition

Saptarshi Basu, Sidy Ndao, Gregory J. Michna, Yoav Peles, Michael K. Jensen
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. May 2011, 133(5): 051503.
https://doi.org/10.1115/1.4003160
Published Online: February 3, 2011
View Article titled, Flow Boiling of R134a in Circular Microtubes—Part II: Study of Critical Heat Flux Condition
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Topics: Boiling, Critical heat flux, Flow (Dynamics), Subcooling
Proceedings Papers

Experimental Identification of Component Parameters for Multiple-Evaporator Vapor Compression Refrigeration Cycle

Juan E. Catano, Tiejun Zhang, Rongliang Zhou, Gregory J. Michna, Michael K. Jensen, Yoav Peles, John T. Wen
Proc. ASME. IMECE2009, Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C, 1357-1364, November 13–19, 2009
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2009-11778
https://doi.org/10.1115/IMECE2009-11778
View Paper titled, Experimental Identification of Component Parameters for Multiple-Evaporator Vapor Compression Refrigeration Cycle
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Topics: Compression, Refrigeration cycles, Vapors, Valves, Design, Simulation models, Steady state, Algorithms, Bridges (Structures), Compressors