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John R. Howell
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Proceedings Papers

Design and Optimization of Thermal Selective Emitters for High-Efficiency Thermophotovoltaic (TPV) Power Generation

Anil Yuksel, Alex Heltzel, John R. Howell
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, V001T10A003, June 28–July 2, 2015
Publisher: American Society of Mechanical Engineers
Paper No: ES2015-49581
https://doi.org/10.1115/ES2015-49581
View Paper titled, Design and Optimization of Thermal Selective Emitters for High-Efficiency Thermophotovoltaic (TPV) Power Generation
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Topics: Design, Diffraction gratings, Energy conversion, Energy gap, Energy generation, Manufacturing, Modeling, Noise (Sound), Optimization, Power converters
Proceedings Papers

A Parametric Study of the Accuracy of Several Radiative Transport Solution Methods for a Set of 2-D Benchmark Problems

John Tencer, John R. Howell
Proc. ASME. HT2013, Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Theory and Fundamental Research in Heat Transfer, V001T01A001, July 14–19, 2013
Publisher: American Society of Mechanical Engineers
Paper No: HT2013-17152
https://doi.org/10.1115/HT2013-17152
View Paper titled, A Parametric Study of the Accuracy of Several Radiative Transport Solution Methods for a Set of 2-D Benchmark Problems
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Topics: Albedo, Boundary-value problems, Electromagnetic scattering, Errors, Finite element analysis, Heat transfer, Radiation (Physics), Radiation scattering, Scattering (Physics)
Proceedings Papers

Design and Verification of a PECVD Fabricated Multi-Layer Nano-Scale Photovoltaic Device

Shima Hajimirza, John R. Howell, Milo Holt, Sayan Saha, Deji Akinwande, Sanjay Banerjee
Proc. ASME. HT2013, Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Theory and Fundamental Research in Heat Transfer, V001T01A003, July 14–19, 2013
Publisher: American Society of Mechanical Engineers
Paper No: HT2013-17271
https://doi.org/10.1115/HT2013-17271
View Paper titled, Design and Verification of a PECVD Fabricated Multi-Layer Nano-Scale Photovoltaic Device
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Topics: Design, Nanoscale phenomena, Plasma-enhanced chemical vapor deposition, Silicon, Spectra (Spectroscopy), Thin films, Engineering simulation, Errors, Reflectance, Simulation
Proceedings Papers

Metamaterial Window Glass for Adaptable Energy Efficiency

Alex Heltzel, Tyler Mann, John R. Howell
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, V002T04A023, July 14–19, 2013
Publisher: American Society of Mechanical Engineers
Paper No: HT2013-17511
https://doi.org/10.1115/HT2013-17511
View Paper titled, Metamaterial Window Glass for Adaptable Energy Efficiency
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Topics: Energy efficiency, Glass, Metamaterials, Emissivity, Absorption, Cold climates, Design, Engineering simulation, Green construction, Nanoscale phenomena
Proceedings Papers

Wavelet Based Nano-Texture Structures for Thin Film PV Cells

Shima Hajimirza, John R. Howell
Proc. ASME. IMECE2012, Volume 9: Micro- and Nano-Systems Engineering and Packaging, Parts A and B, 527-535, November 9–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2012-87045
https://doi.org/10.1115/IMECE2012-87045
View Paper titled, Wavelet Based Nano-Texture Structures for Thin Film PV Cells
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Topics: Texture (Materials), Thin films, Wavelets, Optimization, Diffraction gratings, Silicon, Strips, Absorption, Engineering simulation, Metal surfaces
Proceedings Papers

On Multilayer Modeling of Radiative Transfer for Use With the Multi-Source K-Distribution Method for Inhomogeneous Media

John Tencer, John R. Howell
Proc. ASME. HT2012, Volume 1: Heat Transfer in Energy Systems; Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat and Mass Transfer in Biotechnology; Environmental Heat Transfer; Visualization of Heat Transfer; Education and Future Directions in Heat Transfer, 203-211, July 8–12, 2012
Publisher: American Society of Mechanical Engineers
Paper No: HT2012-58236
https://doi.org/10.1115/HT2012-58236
View Paper titled, On Multilayer Modeling of Radiative Transfer for Use With the Multi-Source K-Distribution Method for Inhomogeneous Media
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Topics: Modeling, Radiative heat transfer, Temperature, Errors, Temperature distribution, Emissivity, Heat flux
Proceedings Papers

Limits of Light Trapping in Silicon Thin Film Cells via Metallic Gratings

Shima Hajimirza, John R. Howell
Proc. ASME. HT2012, Volume 1: Heat Transfer in Energy Systems; Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat and Mass Transfer in Biotechnology; Environmental Heat Transfer; Visualization of Heat Transfer; Education and Future Directions in Heat Transfer, 233-240, July 8–12, 2012
Publisher: American Society of Mechanical Engineers
Paper No: HT2012-58271
https://doi.org/10.1115/HT2012-58271
View Paper titled, Limits of Light Trapping in Silicon Thin Film Cells via Metallic Gratings
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Topics: Diffraction gratings, Silicon, Thin films, Optimization, Photons, Fourier series, Shapes, Simulated annealing, Solar cells, Sunlight
Proceedings Papers

Statistical Analysis of Surface Nanopatterned Thin Film Solar Cells Obtained by Inverse Optimization

Shima Hajimirza, John R. Howell
Proc. ASME. MNHMT2012, ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer, 569-577, March 3–6, 2012
Publisher: American Society of Mechanical Engineers
Paper No: MNHMT2012-75066
https://doi.org/10.1115/MNHMT2012-75066
View Paper titled, Statistical Analysis of Surface Nanopatterned Thin Film Solar Cells Obtained by Inverse Optimization
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Topics: Optimization, Solar cells, Statistical analysis, Thin films, Errors, Light absorption, Manufacturing, Spectra (Spectroscopy), Absorption, Diffraction gratings
Proceedings Papers

Robust Nanoscale Patterns for Thin Film Solar Cells Using Inverse Optimization of Nonuniformly Sampled Absorption Spectrum

Shima Hajimirza, John R. Howell
Proc. ASME. IMECE2011, Volume 4: Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy, Parts A and B, 931-943, November 11–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2011-62803
https://doi.org/10.1115/IMECE2011-62803
View Paper titled, Robust Nanoscale Patterns for Thin Film Solar Cells Using Inverse Optimization of Nonuniformly Sampled Absorption Spectrum
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Topics: Absorption, Nanoscale phenomena, Optimization, Solar cells, Thin films, Engineering simulation, Manufacturing, Silver, Simulation, Solar energy
Proceedings Papers

Simulation of Charge Density and Field Distribution of a Gold Nanoparticle Tip-Terminated Scanning Nanowire Waveguide for Molecular Imaging

Nathan Malcolm, Alex J. Heltzel, Li Shi, John R. Howell
Proc. ASME. HT2009, Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Heat Transfer Equipment; Heat Transfer in Electronic Equipment, 297-301, July 19–23, 2009
Publisher: American Society of Mechanical Engineers
Paper No: HT2009-88351
https://doi.org/10.1115/HT2009-88351
View Paper titled, Simulation of Charge Density and Field Distribution of a Gold Nanoparticle Tip-Terminated Scanning Nanowire Waveguide for Molecular Imaging
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Topics: Density, Imaging, Nanoparticles, Nanowires, Simulation, Waveguides, Boundary-value problems, Cantilevers, Cell membranes, Coating processes
Proceedings Papers

Complete Modeling of a Light-Pipe Radiation Thermometer in a Rapid Thermal Processing System

Hakan Erturk, John R. Howell
Proc. ASME. IMECE2008, Volume 10: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B, and C, 1683-1690, October 31–November 6, 2008
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2008-67341
https://doi.org/10.1115/IMECE2008-67341
View Paper titled, Complete Modeling of a Light-Pipe Radiation Thermometer in a Rapid Thermal Processing System
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Topics: Modeling, Pipes, Radiation (Physics), Rapid thermal processing, Thermometers, Errors, Quartz, Signals, Temperature, Manufacturing
Proceedings Papers

Reverse Monte Carlo Modeling of Signal Transport in Light-Pipe Radiation Thermometers

Hakan Erturk, Ofodike A. Ezekoye, John R. Howell
Proc. ASME. HT2008, Heat Transfer: Volume 1, 633-640, August 10–14, 2008
Publisher: American Society of Mechanical Engineers
Paper No: HT2008-56180
https://doi.org/10.1115/HT2008-56180
View Paper titled, Reverse Monte Carlo Modeling of Signal Transport in Light-Pipe Radiation Thermometers
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Topics: Modeling, Pipes, Radiation (Physics), Signals, Thermometers, Rapid thermal processing, Errors, Monte Carlo methods, Quartz, Temperature
Proceedings Papers

Simulation of Electromagnetic Field Distribution at a Nanowire Probe for Near Field Scanning Optical Microscopy

Nathan P. Malcolm, Alex J. Heltzel, Li Shi, John R. Howell
Proc. ASME. MNHT2008, ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer, Parts A and B, 1309-1312, June 6–9, 2008
Publisher: American Society of Mechanical Engineers
Paper No: MNHT2008-52078
https://doi.org/10.1115/MNHT2008-52078
View Paper titled, Simulation of Electromagnetic Field Distribution at a Nanowire Probe for Near Field Scanning Optical Microscopy
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Topics: Electromagnetic fields, Nanowires, Near-field scanning optical microscopy, Probes, Simulation, Nanoparticles, Design, Excitation, Finite difference time-domain analysis, Laser beams
Proceedings Papers

Drawdown-Effect of Lightpipes in Silicon Wafer Surface Temperature Measurements

Yan Qu, Ekachai Puttitwong, John R. Howell, Ofodike A. Ezekoye, Kenneth S. Ball
Proc. ASME. HT2005, Heat Transfer: Volume 4, 193-198, July 17–22, 2005
Publisher: American Society of Mechanical Engineers
Paper No: HT2005-72203
https://doi.org/10.1115/HT2005-72203
View Paper titled, Drawdown-Effect of Lightpipes in Silicon Wafer Surface Temperature Measurements
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Topics: Semiconductor wafers, Temperature measurement, Temperature, Semiconductors (Materials), Uncertainty, Calibration, Radiation (Physics), Thermometers
Proceedings Papers

Discrete Optimization of Radiant Heaters With Simulated Annealing

Jason M. Porter, Marvin E. Larsen, John R. Howell
Proc. ASME. HT2005, Heat Transfer: Volume 3, 903-908, July 17–22, 2005
Publisher: American Society of Mechanical Engineers
Paper No: HT2005-72160
https://doi.org/10.1115/HT2005-72160
View Paper titled, Discrete Optimization of Radiant Heaters With Simulated Annealing
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Topics: Optimization, Radiant heating equipment, Simulated annealing, Heat transfer, Boundary-value problems, Fire, Heat flux, Radiation (Physics), Temperature, Algorithms
Proceedings Papers

Modeling of a Radiative RTP-Type Furnace Through an Inverse Design: Mathematical Model and Experimental Results

Mirko Gamba, Hakan Ertu¨rk, Ofodike A. Ezekoye, John R. Howell
Proc. ASME. IMECE2002, Heat Transfer, Volume 3, 237-246, November 17–22, 2002
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2002-33844
https://doi.org/10.1115/IMECE2002-33844
View Paper titled, Modeling of a Radiative RTP-Type Furnace Through an Inverse Design: Mathematical Model and Experimental Results
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Topics: Design, Furnaces, Modeling, Semiconductor wafers, Geometry, Gradient methods, Heat flux, Heat transfer, Heating, Inverse problems
Proceedings Papers

The Development of Engineering Radiative Heat Transfer

John R. Howell
Proc. ASME. IMECE2002, Technology and Society and Engineering Business Management, 73-78, November 17–22, 2002
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2002-33131
https://doi.org/10.1115/IMECE2002-33131
View Paper titled, The Development of Engineering Radiative Heat Transfer
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Topics: Heat transfer, High temperature, Manufacturing, Microscale devices, Physics, Propulsion systems, Radiation (Physics), Radiative heat transfer, Space vehicles, Thermal radiation
Proceedings Papers

Inverse Methods for Design and Control of Thermal Systems: Validation in a 2-D Visible Light Enclosure

Mirko Gamba, Trey Pavy, John R. Howell
Proc. ASME. IMECE2003, Heat Transfer, Volume 3, 141-149, November 15–21, 2003
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2003-41665
https://doi.org/10.1115/IMECE2003-41665
View Paper titled, Inverse Methods for Design and Control of Thermal Systems: Validation in a 2-D Visible Light Enclosure
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Topics: Design, Light, Thermal systems, Visible spectrum, Radiative heat transfer, Capacitance, Steady state, Inertia (Mechanics), Transients (Dynamics), Convection
Proceedings Papers

Analytical and Experimental Investigation of Laser-Nanosphere Interaction for Nanoscale Surface Modification

Alex J. Heltzel, Senthil Theppakuttai, John R. Howell, Shaochen Chen
Proc. ASME. IMECE2004, Heat Transfer, Volume 2, 457-461, November 13–19, 2004
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2004-61983
https://doi.org/10.1115/IMECE2004-61983
View Paper titled, Analytical and Experimental Investigation of Laser-Nanosphere Interaction for Nanoscale Surface Modification
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Topics: Lasers, Nanoscale phenomena, Silicon, Wavelength, Approximation, Irradiation (Radiation exposure), Melting, Nd-YAG lasers