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S. Dutta

Bio: S. Dutta is an academic researcher from University of South Carolina. The author has contributed to research in topics: Heat transfer & Turbulence. The author has an hindex of 18, co-authored 31 publications receiving 2792 citations. Previous affiliations of S. Dutta include University of Calcutta & Louisiana State University.

Papers
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Book
22 Mar 2001
TL;DR: In this article, the authors present a detailed discussion of the relationship between the heat transfer and the cooling properties of a cascade-vane with respect to the rotation of the Cascade Vane.
Abstract: Fundamentals Need for Turbine Blade Cooling Turbine-Cooling Technology Turbine Heat Transfer and Cooling Issues Structure of the Book Review Articles and Book Chapters on Turbine Cooling and Heat Transfer New Information from 2000 to 2010 References Turbine Heat Transfer Introduction Turbine-Stage Heat Transfer Cascade Vane Heat-Transfer Experiments Cascade Blade Heat Transfer Airfoil Endwall Heat Transfer Turbine Rotor Blade Tip Heat Transfer Leading-Edge Region Heat Transfer Flat-Surface Heat Transfer New Information from 2000 to 2010 2.10 Closure References Turbine Film Cooling Introduction Film Cooling on Rotating Turbine Blades Film Cooling on Cascade Vane Simulations Film Cooling on Cascade Blade Simulations Film Cooling on Airfoil Endwalls Turbine Blade Tip Film Cooling Leading-Edge Region Film Cooling Flat-Surface Film Cooling Discharge Coefficients of Turbine Cooling Holes 3.10 Film-Cooling Effects on Aerodynamic Losses 3.11 New Information from 2000 to 2010 3.12 Closure References Turbine Internal Cooling Jet Impingement Cooling Rib-Turbulated Cooling Pin-Fin Cooling Compound and New Cooling Techniques New Information from 2000 to 2010 References Turbine Internal Cooling with Rotation Rotational Effects on Cooling Smooth-Wall Coolant Passage Heat Transfer in a Rib-Turbulated Rotating CoolantPassage Effect of Channel Orientation with Respect to the RotationDirection on Both Smooth and Ribbed Channels Effect of Channel Cross Section on Rotating Heat Transfer Different Proposed Correlation to Relate the Heat Transferwith Rotational Effects Heat-Mass-Transfer Analogy and Detail Measurements Rotation Effects on Smooth-Wall Impingement Cooling Rotational Effects on Rib-Turbulated Wall ImpingementCooling New Information from 2000 to 2010 References Experimental Methods Introduction Heat-Transfer Measurement Techniques Mass-Transfer Analogy Techniques Liquid Crystal Thermography Flow and Thermal Field Measurement Techniques New Information from 2000 to 2010 Closure References Numerical Modeling Governing Equations and Turbulence Models Numerical Prediction of Turbine Heat Transfer Numerical Prediction of Turbine Film Cooling Numerical Prediction of Turbine Internal Cooling New Information from 2000 to 2010 References Final Remarks Turbine Heat Transfer and Film Cooling Turbine Internal Cooling with Rotation Turbine Edge Heat Transfer and Cooling New Information from 2000 to 2010 Closure Index

1,149 citations

Journal ArticleDOI
TL;DR: In this article, a numerical model was developed to predict the mass flow between channels in a polymer electrolyte membrane (PEM) fuel cell with a serpentine flow path, and the results indicated that flow distribution in both anode and cathode channels are significantly affected by the mass consumption patterns on the Membrane Electrode Assembly (MEA).

433 citations

Journal ArticleDOI
TL;DR: In this paper, an integrated flow and current density model was developed to predict current density distributions in two dimensions on the membrane in a straight channel PEM fuel cell, which includes diffusion layers on both the anode and cathode sides and solved the same primary flow related variables in the main flow channel and the diffusion layer.
Abstract: The need to model three-dimensional flow in polymer electrolyte membrane (PEM) fuel cells is discussed by developing an integrated flow and current density model to predict current density distributions in two dimensions on the membrane in a straight channel PEM fuel cell. The geometrical model includes diffusion layers on both the anode and cathode sides and the numerical model solves the same primary flow related variables in the main flow channel and the diffusion layer. A control volume approach is used and source terms for transport equations are presented to facilitate their incorporation in commercial flow solvers. Predictions reveal that the inclusion of a diffusion layer creates a lower and more uniform current density compared to cases without diffusion layers. The results also show that the membrane thickness and cell voltage have a significant effect on the axial distribution of the current density and net rate of water transport. The predictions of the water transport between cathode and anode across the width of the flow channel show the delicate balance of diffusion and electroosmosis and their effect on the current distribution along channel.

329 citations

Journal ArticleDOI
TL;DR: In this paper, a numerical three-dimensional model is developed that includes the energy equation to predict the temperature distribution inside a straight channel PEM fuel cell and the effect of heat produced by the electrochemical reactions on fuel cell performance.
Abstract: A numerical three-dimensional model is developed that includes the energy equation to predict the temperature distribution inside a straight channel proton exchange membrane (PEM) fuel cell and the effect of heat produced by the electrochemical reactions on fuel cell performance. A control volume approach is used and source terms for transport equations, heat generation, and a phase change model are presented to facilitate their incorporation in commercial flow solvers. Predictions show that the fuel cell performance depends not merely on the inlet humidity condition, cell voltage, and membrane thickness but also on the temperature rise inside fuel cells.

177 citations

Journal ArticleDOI
TL;DR: In this paper, the authors used nonlinear and standard k-ɛ turbulence models to predict the Reynolds stresses in the core flow region immediately above the ribs and the local Nusselt numbers were underpredicted.

117 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors present the latest status of PEM fuel cell technology development and applications in the transportation, stationary, and portable/micro power generation sectors through an overview of the state-of-the-art and most recent technical progress.

2,687 citations

Journal ArticleDOI
TL;DR: Technical Challenges 4754 4.2.1.
Abstract: 3.8.2. Temperature Distribution Measurements 4749 3.8.3. Two-Phase Visualization 4750 3.8.4. Experimental Validation 4751 3.9. Modeling the Catalyst Layer at Pore Level 4751 3.10. Summary and Outlook 4752 4. Direct Methanol Fuel Cells 4753 4.1. Technical Challenges 4754 4.1.1. Methanol Oxidation Kinetics 4754 4.1.2. Methanol Crossover 4755 4.1.3. Water Management 4755 4.1.4. Heat Management 4756 4.2. DMFC Modeling 4756 4.2.1. Needs for Modeling 4756 4.2.2. DMFC Models 4756 4.3. Experimental Diagnostics 4757 4.4. Model Validation 4758 4.5. Summary and Outlook 4760 5. Solid Oxide Fuel Cells 4760 5.1. SOFC Models 4761 5.2. Summary and Outlook 4762 6. Closing Remarks 4763 7. Acknowledgments 4763 8. References 4763

1,132 citations

Journal ArticleDOI
TL;DR: In this paper, the formation and distribution of condensed water in diffusion medium of proton exchange membrane fuel cells, and its tendency to reduce the local effective mass diffusivity and to influence cell performance, are studied.

922 citations

Journal ArticleDOI
TL;DR: In this article, the authors reviewed more than 100 references related to water management in proton exchange membrane (PEM) fuel cells, with a particular focus on the issue of water flooding, its diagnosis and mitigation.

841 citations