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Journal Articles

Characterization of a Rack-Level Thermosyphon-Based Cooling System

R. Khalid, S. G. Schon, R. L. Amalfi, A. Ortega, A. P. Wemhoff
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Research-Article
J. Electron. Packag. September 2024, 146(3): 031007.
Paper No: EP-23-1068
https://doi.org/10.1115/1.4064524
Published Online: March 11, 2024
View Article titled, Characterization of a Rack-Level Thermosyphon-Based Cooling System
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Topics: Condensers (steam plant), Cooling, Cooling systems, Data centers, Fluids, Heat, Heat recovery, Refrigerants, Stress, Temperature
Proceedings Papers

Assessing the Lubrication Performance of Sunflower Oil Modified With Montmorillonite Clay (MMT) Nanoparticles for Industrial Applications

Md Mashfiqur Rahman, Md Abu Sayeed Biswas, Laura Peña-Parás, Demófilo Maldonado-Cortés, Javier A. Ortega
Proc. ASME. IMECE2023, Volume 7: Energy, V007T08A022, October 29–November 2, 2023
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2023-114757
https://doi.org/10.1115/IMECE2023-114757
View Paper titled, Assessing the Lubrication Performance of Sunflower Oil Modified With Montmorillonite Clay (MMT) Nanoparticles for Industrial Applications
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Topics: Lubrication, Nanoparticles, Lubricants, Wear, Friction, Nanoclays, Petroleum, Torque, Tribology, Biodegradation
Journal Articles

Validation and Application of a Finned Tube Heat Exchanger Model for Rack-Level Cooling

R. Khalid, E. Youssef, R. L. Amalfi, A. Ortega, A. P. Wemhoff
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Research-Article
J. Electron. Packag. June 2024, 146(2): 021005.
Paper No: EP-23-1016
https://doi.org/10.1115/1.4063252
Published Online: November 10, 2023
View Article titled, Validation and Application of a Finned Tube Heat Exchanger Model for Rack-Level Cooling
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Topics: Flow (Dynamics), Heat exchangers, Refrigerants, Temperature, Heat, Cooling, Fluids, Pressure
Proceedings Papers

Application of Transient Heat Flux Sensors to Resolve Time-Dependent Convective Heat Transfer From Wall-Mounted Cubes

E. R. Meinders, M. J. Geuzebroek, K. Hanjalić, A. Ortega
Proc. ASME. IMECE98, Heat Transfer: Volume 5 — Numerical and Experimental Methods in Heat Transfer, 617-623, November 15–20, 1998
Publisher: American Society of Mechanical Engineers
Paper No: IMECE1998-0783
https://doi.org/10.1115/IMECE1998-0783
View Paper titled, Application of Transient Heat Flux Sensors to Resolve Time-Dependent Convective Heat Transfer From Wall-Mounted Cubes
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Topics: Convection, Heat flux, Sensors, Transients (Dynamics), Signals, Spectra (Spectroscopy), Calibration, Flow (Dynamics), Frequency response, Glass
Proceedings Papers

Designing for Maintainability in Preliminary Aircraft Engine Design

Carrie R. Nottingham, Roberto A. Ortega, Bharadwaj Rangarajan, Patrick N. Koch, Farrokh Mistree
Proc. ASME. DETC97, Volume 2: 23rd Design Automation Conference, V002T29A021, September 14–17, 1997
Publisher: American Society of Mechanical Engineers
Paper No: DETC97/DAC-3963
https://doi.org/10.1115/DETC97/DAC-3963
View Paper titled, Designing for Maintainability in Preliminary Aircraft Engine Design
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Topics: Aircraft engines, Design, Maintainability, Maintenance, Aircraft, Conceptual design, Cycles, Engine design, Engines, Gas turbines
Proceedings Papers

Including Life Cycle Considerations in the Design of an Electric Vehicle Space Frame

Roberto A. Ortega, Bert Bras
Proc. ASME. DETC98, Volume 2: 24th Design Automation Conference, V002T02A001, September 13–16, 1998
Publisher: American Society of Mechanical Engineers
Paper No: DETC98/DAC-5593
https://doi.org/10.1115/DETC98/DAC-5593
View Paper titled, Including Life Cycle Considerations in the Design of an Electric Vehicle Space Frame
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Topics: Cycles, Design, Electric vehicles, Space frame structures, Vehicles, Emissions, Energy consumption, Life cycle assessment, Maintenance, Recycling
Proceedings Papers

A Decision Support Model for the Life-Cycle Design of a Family of Oil Filters

Roberto A. Ortega, Uma-Shankar Kalyan-Seshu, Bert Bras
Proc. ASME. DETC99, Volume 1: 25th Design Automation Conference, 1185-1196, September 12–16, 1999
Publisher: American Society of Mechanical Engineers
Paper No: DETC99/DAC-8612
https://doi.org/10.1115/DETC99/DAC-8612
View Paper titled, A Decision Support Model for the Life-Cycle Design of a Family of Oil Filters
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Topics: Cycles, Design, Filters, Flow (Dynamics), Life cycle assessment, Performance characterization, Tradeoffs
Journal Articles

Micro-Abrasive Wear Testing of Surface Engineered Surgical Grade CoCrMo Alloy for Biotribological Applications

J. A. Ortega-Saenz, M. A. L. Hernandez-Rodriguez, R. Michalczewski
Journal: Materials Performance and Characterization
Publisher: ASTM International
Article Type: Research-Article
Matls. Perf. Charact.. July 2016, 5(4): 472–484.
Paper No: MPC20160042
https://doi.org/10.1520/MPC20160042
Published Online: December 15, 2016
View Article titled, Micro-Abrasive Wear Testing of Surface Engineered Surgical Grade CoCrMo Alloy for Biotribological Applications
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Proceedings Papers

Thermodynamic Analysis of Hybrid Liquid-Air-Based Data Center Cooling Strategies

A. Bhalerao, A. Ortega, A. P. Wemhoff
Proc. ASME. IMECE2014, Volume 8B: Heat Transfer and Thermal Engineering, V08BT10A080, November 14–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2014-38359
https://doi.org/10.1115/IMECE2014-38359
View Paper titled, Thermodynamic Analysis of Hybrid Liquid-Air-Based Data Center Cooling Strategies
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Topics: Cooling, Data centers, Exergy, Coolers, Doors, Heat exchangers, Computer software, Cooling systems, Heat, Modeling
Proceedings Papers

Optimization of Data Center Cooling Efficiency Using Reduced Order Flow Modeling Within a Flow Network Modeling Approach

K. Fouladi, A. P. Wemhoff, L. Silva-Llanca, A. Ortega
Proc. ASME. IMECE2014, Volume 8B: Heat Transfer and Thermal Engineering, V08BT10A082, November 14–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2014-39558
https://doi.org/10.1115/IMECE2014-39558
View Paper titled, Optimization of Data Center Cooling Efficiency Using Reduced Order Flow Modeling Within a Flow Network Modeling Approach
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Topics: Cooling, Data centers, Flow (Dynamics), Modeling, Optimization, Exergy, Air flow, Computational fluid dynamics, Simulation, Design
Proceedings Papers

A Transient Model for Parallel Flow and Counter Flow Heat Exchangers

K. Abbasi, M. Del Valle, A. P. Wemhoff, A. Ortega
Proc. ASME. InterPACK2013, Volume 1: Advanced Packaging; Emerging Technologies; Modeling and Simulation; Multi-Physics Based Reliability; MEMS and NEMS; Materials and Processes, V001T04A008, July 16–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2013-73118
https://doi.org/10.1115/IPACK2013-73118
View Paper titled, A Transient Model for Parallel Flow and Counter Flow Heat Exchangers
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Topics: Flow (Dynamics), Heat exchangers, Transients (Dynamics), Fluids, Capacitance, Exterior walls, Finite volume methods, Heat conduction, Heat transfer coefficients, Steady state
Proceedings Papers

Heat Transfer due to the Impingement of an Axisymmetric Synthetic Jet Emanating From a Circular Orifice: A Numerical Investigation of a Canonical Geometry

M. Ebrahim, L. Silva, A. Ortega
Proc. ASME. InterPACK2013, Volume 2: Thermal Management; Data Centers and Energy Efficient Electronic Systems, V002T08A003, July 16–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2013-73033
https://doi.org/10.1115/IPACK2013-73033
View Paper titled, Heat Transfer due to the Impingement of an Axisymmetric Synthetic Jet Emanating From a Circular Orifice: A Numerical Investigation of a Canonical Geometry
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Topics: Geometry, Heat transfer, Flow (Dynamics), Reynolds number, Suction, Actuators, Convection, Cooling, Cycles, Diffusion (Physics)
Proceedings Papers

Thermodynamic Modeling of Data Center Cooling Systems

A. P. Wemhoff, M. del Valle, K. Abbasi, A. Ortega
Proc. ASME. InterPACK2013, Volume 2: Thermal Management; Data Centers and Energy Efficient Electronic Systems, V002T09A008, July 16–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2013-73116
https://doi.org/10.1115/IPACK2013-73116
View Paper titled, Thermodynamic Modeling of Data Center Cooling Systems
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Topics: Cooling systems, Data centers, Modeling, Flow (Dynamics), Air conditioning, Air flow, Design, Exergy, Fluid mechanics, Heat transfer
Journal Articles

Effect of Fly Ash on the Shear Strength of Concrete Beams Without Shear Reinforcement

Mahdi Arezoumandi, Jeffery S. Volz, Carlos A. Ortega
Journal: Advances in Civil Engineering Materials
Publisher: ASTM International
Article Type: Research-Article
Adv. Civ. Eng. Matls.. June 2013, 2(1): 233–251.
Paper No: ACEM20120052
https://doi.org/10.1520/ACEM20120052
Published Online: May 31, 2013
View Article titled, Effect of Fly Ash on the Shear Strength of Concrete Beams Without Shear Reinforcement
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Proceedings Papers

HEM as an Environmental Friendly Alternative to Produce UFC

J. C. Arteaga-Arcos, J. Trujillo-Reyes, D. J. Delgado-Herna´ndez, A. Santamari´a-Ortega, O. A. Chimal-Valencia, H. T. Yee-Madeira
Proc. ASME. IMECE2011, Volume 3: Design and Manufacturing, 911-914, November 11–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2011-63850
https://doi.org/10.1115/IMECE2011-63850
View Paper titled, HEM as an Environmental Friendly Alternative to Produce UFC
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Topics: Advanced materials, Ball milling, Ball mills, Cement industry, Cements (Adhesives), Dimensions, Grinding, Manufacturing, Milling, Particle size
Proceedings Papers

Heating of Bee Honey, Olive Oil, Milk and Water in a Solar Cooker Box Type With Internal Reflectors

H. Terres, J. A. Ortega, M. Gordon, J. R. Morales, A. Lizardi
Proc. ASME. ES2007, ASME 2007 Energy Sustainability Conference, 1117-1122, July 27–30, 2007
Publisher: American Society of Mechanical Engineers
Paper No: ES2007-36095
https://doi.org/10.1115/ES2007-36095
View Paper titled, Heating of Bee Honey, Olive Oil, Milk and Water in a Solar Cooker Box Type With Internal Reflectors
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Topics: Heating, Optical mirrors, Solar energy, Temperature, Water
Journal Articles

Comparative Study of Phenolics Degradation Between Biological and Photocatalytic Systems

J. A. Herrera Melián, J. Araña, J. A. Ortega, F. Martín Muñoz, E. Tello Rendón, J. Pérez Peña
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. November 2008, 130(4): 041003.
https://doi.org/10.1115/1.2969800
Published Online: September 4, 2008
View Article titled, Comparative Study of Phenolics Degradation Between Biological and Photocatalytic Systems
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Topics: Pollution, Solar energy, Ultraviolet radiation, Gravel, Industrial wastes, Sewage, Constructed wetlands, Solar radiation
Proceedings Papers

An Empirical Equation for Flow Through Porous Media

C. A. Ortega Vivas, S. Barraga´n Gonza´lez, J. M. Garibay Cisneros
Proc. ASME. IMECE2005, Fluids Engineering, 485-492, November 5–11, 2005
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2005-79138
https://doi.org/10.1115/IMECE2005-79138
View Paper titled, An Empirical Equation for Flow Through Porous Media
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Topics: Flow (Dynamics), Porous materials, Pressure drop, Experimental methods, Reynolds number, Viscosity
Journal Articles

Numerical Study of the Injection Process in a Transonic Wind Tunnel—Part I: The Design Point

João B. P. Falcão Filho, Marcos A. Ortega
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. June 2007, 129(6): 682–694.
https://doi.org/10.1115/1.2734236
Published Online: December 5, 2006
View Article titled, Numerical Study of the Injection Process in a Transonic Wind Tunnel—Part I: The Design Point
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Topics: Design, Ejectors, Flow (Dynamics), Jets, Pressure, Tunnels, Turbulence, Wind tunnels, Circuits, Boundary-value problems
Journal Articles

Heat Transfer in Water-Cooled Silicon Carbide Milli-Channel Heat Sinks for High Power Electronic Applications

C. Bower, A. Ortega, P. Skandakumaran, R. Vaidyanathan, T. Phillips
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Article
J. Heat Mass Transfer. January 2005, 127(1): 59–65.
https://doi.org/10.1115/1.1852494
Published Online: February 15, 2005
View Article titled, Heat Transfer in Water-Cooled Silicon Carbide Milli-Channel Heat Sinks for High Power Electronic Applications
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Topics: Extruding, Flow (Dynamics), Friction, Heat, Heat exchangers, Heat sinks, Heat transfer, Manufacturing, Silicon, Water