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Journal Articles

Performance Analysis of a Phase Changing Material Based Thermocycler for Nucleic Acid Amplification

B. Indulakshmi, Nikhil Prasad, Ranjith S. Kumar
Journal: Journal of Thermal Science and Engineering Applications
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. May 2023, 15(5): 050901.
Paper No: TSEA-22-1204
DOI: https://doi.org/10.1115/1.4055070
Published Online: March 29, 2023
View Article titled, Performance Analysis of a Phase Changing Material Based Thermocycler for Nucleic Acid Amplification
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Topics: Annealing, Fluids, Heat transfer, Melting, Temperature, Maintenance, Flow (Dynamics), Microfluidics
Journal Articles

Finite Element Analysis of Bent Rotors

Konrad Juethner, Ted Rose, J. S. Kumar, Jianming Cao, Gregory M. Savela, Chris J. Zuck, Parag H. Mathuria
Journal: Journal of Engineering for Gas Turbines and Power
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2023, 145(1): 011025.
Paper No: GTP-22-1404
DOI: https://doi.org/10.1115/1.4055452
Published Online: December 14, 2022
View Article titled, Finite Element Analysis of Bent Rotors
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Topics: Rotors, Bearings
Proceedings Papers

Finite Element Analysis of Bent Rotors

Konrad Juethner, Ted Rose, J. S. Kumar, Jianming Cao, Gregory M. Savela, Chris J. Zuck, Parag H. Mathuria
Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT26A003, June 13–17, 2022
Paper No: GT2022-79752
DOI: https://doi.org/10.1115/GT2022-79752
View Paper titled, Finite Element Analysis of Bent Rotors
Click here to open pdf in another window PDF for Finite Element Analysis of Bent Rotors
Topics: Finite element analysis, Rotors, Bearings, Excitation, Finite element methods, Manufacturing, Metrology, Rotor assembly, Stress, Cooling
Proceedings Papers

Mixed Whirl Modes in Numerical Rotordynamics Analysis

Konrad Juethner, Ted Rose, J. S. Kumar, Jianming Cao, Gregory M. Savela, Chris J. Zuck, Parag H. Mathuria
Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT26A004, June 13–17, 2022
Paper No: GT2022-79755
DOI: https://doi.org/10.1115/GT2022-79755
View Paper titled, Mixed Whirl Modes in Numerical Rotordynamics Analysis
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Topics: Rotordynamics, Whirls, Rotors, Design, Eigenvalues, Stability, Algorithms, Economics , Fatigue, Finite element analysis
Journal Articles

Micromechanics Approach for the Overall Elastic Properties of Ceramic Matrix Composites Incorporating Defect Structures

Rajesh S. Kumar
Journal: Journal of Engineering for Gas Turbines and Power
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2022, 144(3): 031026.
Paper No: GTP-20-1427
DOI: https://doi.org/10.1115/1.4049485
Published Online: February 10, 2022
View Article titled, Micromechanics Approach for the Overall Elastic Properties of Ceramic Matrix Composites Incorporating Defect Structures
Click here to open pdf in another window PDF for Micromechanics Approach for the Overall Elastic Properties of Ceramic Matrix Composites Incorporating Defect Structures
Topics: Ceramic matrix composites, Elasticity, Micromechanics (Engineering), Fibers, Composite materials
Journal Articles

Analytical Modeling of Laminar Developing Flow Between Hydrophobic Surfaces With Different Slip-Velocities

Vijay V. Sankar, Jaimon Cletus, Arun M. G., Ranjith S. Kumar
Journal: Journal of Fluids Engineering
Article Type: Research-Article
J. Fluids Eng. April 2022, 144(4): 041301.
Paper No: FE-21-1233
DOI: https://doi.org/10.1115/1.4053251
Published Online: February 7, 2022
View Article titled, Analytical Modeling of Laminar Developing Flow Between Hydrophobic Surfaces With Different Slip-Velocities
Click here to open pdf in another window PDF for Analytical Modeling of Laminar Developing Flow Between Hydrophobic Surfaces With Different Slip-Velocities
Topics: Boundary layers, Entrance region, Flow (Dynamics), Fluids, Hydrodynamics, Hydrophobicity, Microchannels, Modeling, Momentum, Particulate matter
Proceedings Papers

Surface-Mounted Distributed Fiber Optic Sensor Measurements, and Concrete Damaged Plasticity Modeling for Damage Analysis of Reinforced Concrete Beams

U. M. N. Jayawickrema, A. S. Kumar, H. M. C. M. Herath, N. K. Hettiarachchi, H. P. Sooriyaarachchi, J. A. Epaarachchi
Proc. ASME. SMASIS2021, ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, V001T08A002, September 14–15, 2021
Paper No: SMASIS2021-67524
DOI: https://doi.org/10.1115/SMASIS2021-67524
View Paper titled, Surface-Mounted Distributed Fiber Optic Sensor Measurements, and Concrete Damaged Plasticity Modeling for Damage Analysis of Reinforced Concrete Beams
Click here to open pdf in another window PDF for Surface-Mounted Distributed Fiber Optic Sensor Measurements, and Concrete Damaged Plasticity Modeling for Damage Analysis of Reinforced Concrete Beams
Topics: Concretes, Damage, Fiber optic sensors, Modeling, Plasticity, Reinforced concrete, Structural health monitoring
Proceedings Papers

Optimal Design of Forging Processes With Deformation and Temperature Constraints

R. V. Grandhi, H. Cheng, S. S. Kumar
Proc. ASME. DETC93, 19th Design Automation Conference: Volume 2 — Design Optimization; Geometric Modeling and Tolerance Analysis; Mechanism Synthesis and Analysis; Decomposition and Design Optimization, 583-593, September 19–22, 1993
Paper No: DETC1993-0433
DOI: https://doi.org/10.1115/DETC1993-0433
View Paper titled, Optimal Design of Forging Processes With Deformation and Temperature Constraints
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Topics: Deformation, Design, Forging, Temperature, Disks, Finite element analysis, Forgings (Products), Optimal control, Plane strain, Thermal analysis
Proceedings Papers

Micromechanics Approach for the Overall Elastic Properties of Ceramic Matrix Composites Incorporating Defect Structures

Rajesh S. Kumar
Proc. ASME. GT2020, Volume 3: Ceramics; Coal, Biomass, Hydrogen, and Alternative Fuels, V003T02A011, September 21–25, 2020
Paper No: GT2020-16056
DOI: https://doi.org/10.1115/GT2020-16056
View Paper titled, Micromechanics Approach for the Overall Elastic Properties of Ceramic Matrix Composites Incorporating Defect Structures
Click here to open pdf in another window PDF for Micromechanics Approach for the Overall Elastic Properties of Ceramic Matrix Composites Incorporating Defect Structures
Topics: Ceramic matrix composites, Elasticity, Micromechanics (Engineering)
Journal Articles

Foreign Object Impact Damage in Ceramic Matrix Composites: Experiments and Computational Predictions

Rajesh S. Kumar, Matthew D. Mordasky
Journal: Journal of Engineering for Gas Turbines and Power
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2020, 142(4): 041014.
Paper No: GTP-19-1440
DOI: https://doi.org/10.1115/1.4044931
Published Online: February 3, 2020
View Article titled, Foreign Object Impact Damage in Ceramic Matrix Composites: Experiments and Computational Predictions
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Topics: Ceramic matrix composites, Damage, Delamination, Finite element analysis
Proceedings Papers

Foreign Object Impact Damage in Ceramic Matrix Composites: Experiments and Computational Predictions

Rajesh S. Kumar, Matthew M. Mordasky
Proc. ASME. GT2019, Volume 6: Ceramics; Controls, Diagnostics, and Instrumentation; Education; Manufacturing Materials and Metallurgy, V006T02A006, June 17–21, 2019
Paper No: GT2019-90368
DOI: https://doi.org/10.1115/GT2019-90368
View Paper titled, Foreign Object Impact Damage in Ceramic Matrix Composites: Experiments and Computational Predictions
Click here to open pdf in another window PDF for Foreign Object Impact Damage in Ceramic Matrix Composites: Experiments and Computational Predictions
Topics: Ceramic matrix composites, Damage, Finite element analysis
Proceedings Papers

Delamination Fracture in Ceramic Matrix Composites: From Coupons to Components

Rajesh S. Kumar, Matthew Mordasky, Greg Ojard
Proc. ASME. GT2018, Volume 6: Ceramics; Controls, Diagnostics, and Instrumentation; Education; Manufacturing Materials and Metallurgy, V006T02A003, June 11–15, 2018
Paper No: GT2018-75571
DOI: https://doi.org/10.1115/GT2018-75571
View Paper titled, Delamination Fracture in Ceramic Matrix Composites: From Coupons to Components
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Topics: Ceramic matrix composites, Delamination, Fracture (Materials), Modeling, Cantilever beams, Computer simulation, Finite element analysis, Fracture toughness, Geometry, Stress
Journal Articles

High Energy Efficiency With Low-Pressure Drop Configuration for an All-Vanadium Redox Flow Battery

S. Kumar, S. Jayanti
Journal: Journal of Electrochemical Energy Conversion and Storage
Article Type: Research-Article
J. Electrochem. En. Conv. Stor. November 2016, 13(4): 041005.
Paper No: JEECS-16-1103
DOI: https://doi.org/10.1115/1.4035847
Published Online: February 23, 2017
View Article titled, High Energy Efficiency With Low-Pressure Drop Configuration for an All-Vanadium Redox Flow Battery
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Topics: Batteries, Energy efficiency, Flow (Dynamics), Pressure drop, Electrolytes, Pressure
Proceedings Papers

Design Optimisation and Life Estimation of Split Hub Geometry of FSAE Car

Suraj Raju, Pavan Kumar Asu Vijaya, Varun S. Kumar, Nikhil Manjunath, Harish Nagaraj
Proc. ASME. IMECE2016, Volume 9: Mechanics of Solids, Structures and Fluids; NDE, Diagnosis, and Prognosis, V009T12A026, November 11–17, 2016
Paper No: IMECE2016-66981
DOI: https://doi.org/10.1115/IMECE2016-66981
View Paper titled, Design Optimisation and Life Estimation of Split Hub Geometry of FSAE Car
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Topics: Design, Geometry, Optimization, Stress, Fracture (Materials), Failure, Machine components, Stress concentration, Vibration, Bending strength
Journal Articles

Effect of Channel Inlet Blockage on the Wake Structure of a Rotationally Oscillating Cylinder

S. Kumar
Journal: Journal of Fluids Engineering
Article Type: Research-Article
J. Fluids Eng. December 2016, 138(12): 121203.
Paper No: FE-15-1667
DOI: https://doi.org/10.1115/1.4034193
Published Online: September 12, 2016
View Article titled, Effect of Channel Inlet Blockage on the Wake Structure of a Rotationally Oscillating Cylinder
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Topics: Cylinders, Oscillations, Vortices, Wakes, Vortex shedding
Journal Articles

High-Ampacity Overhead Power Lines With Carbon Nanostructure–Epoxy Composites

V. S. N. Ranjith Kumar, S. Kumar, G. Pal, Tushar Shah
Journal: Journal of Engineering Materials and Technology
Article Type: Research-Article
J. Eng. Mater. Technol. October 2016, 138(4): 041018.
Paper No: MATS-15-1217
DOI: https://doi.org/10.1115/1.4034095
Published Online: August 9, 2016
View Article titled, High-Ampacity Overhead Power Lines With Carbon Nanostructure–Epoxy Composites
Click here to open pdf in another window PDF for High-Ampacity Overhead Power Lines With Carbon Nanostructure–Epoxy Composites
Topics: Aluminum, Carbon, Composite materials, Epoxy adhesives, Epoxy resins, Finite element analysis, Temperature, Thermal analysis, Thermal expansion, Transmission lines
Proceedings Papers

Interference Between a Square and a Circular Cylinder

Nithin S. Kumar, R. Ajith Kumar, Jayalakshmi Mohan
Proc. ASME. AJKFluids2015, Volume 1A: Symposia, Part 2, V01AT12A005, July 26–31, 2015
Paper No: AJKFluids2015-12677
DOI: https://doi.org/10.1115/AJKFluids2015-12677
View Paper titled, Interference Between a Square and a Circular Cylinder
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Topics: Circular cylinders, Flow (Dynamics), Cylinders, Shear (Mechanics), Flow visualization, Reynolds number, Water
Journal Articles

Mask-Less Electrochemical Additive Manufacturing: A Feasibility Study

Murali M. Sundaram, Abishek B. Kamaraj, Varun S. Kumar
Journal: Journal of Manufacturing Science and Engineering
Article Type: Research-Article
J. Manuf. Sci. Eng. April 2015, 137(2): 021006.
Paper No: MANU-14-1203
DOI: https://doi.org/10.1115/1.4029022
Published Online: April 1, 2015
View Article titled, Mask-Less Electrochemical Additive Manufacturing: A Feasibility Study
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Topics: Additive manufacturing, Computer numerical control machine tools, Computer-aided design, Cycles, Electrochemical cells, Electrolytes, Manufacturing, Nickel, Simulation, Optical microscopes
Proceedings Papers

A Software Environment for the Modelling, Simulation and Control of Industrial Gas Turbine Engines

C. Poole, A. G. Salsi, F. S. Bhinder, S. Kumar
Proc. ASME. GT1991, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T11A006, June 3–6, 1991
Paper No: 91-GT-332
DOI: https://doi.org/10.1115/91-GT-332
View Paper titled, A Software Environment for the Modelling, Simulation and Control of Industrial Gas Turbine Engines
Click here to open pdf in another window PDF for A Software Environment for the Modelling, Simulation and Control of Industrial Gas Turbine Engines
Topics: Computer software, Gas turbines, Industrial gases, Modeling, Simulation, Control equipment, Design, Fuels
Proceedings Papers

Endwall Flow Development Across a Contra-Rotating Fan Unit

S. Kumar, Bhaskar Roy
Proc. ASME. GT2000, Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, V001T03A071, May 8–11, 2000
Paper No: 2000-GT-0502
DOI: https://doi.org/10.1115/2000-GT-0502
View Paper titled, Endwall Flow Development Across a Contra-Rotating Fan Unit
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Topics: Flow (Dynamics), Blades, Clearances (Engineering), Rotors, Fluids, Flow measurement, Steady state