Advances in Computational Heat and Mass Transfer

Name: Advances in Computational Heat and Mass Transfer | Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, Düsseldorf, Germany, Volume 1
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Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, Düsseldorf, Germany, Volume 1

Ali Cemal Benim Rachid Bennacer Abdulmajeed A. Mohamad Pawel Oclon Sang-Ho Suh Jan Taler(Herausgeber*in)

Springer (Verlag)

1. Auflage

Erschienen am 30. August 2024

XXII, 755 Seiten

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Inhalt

Intro
Preface
Organization
Contents
Air Conditioning
Numerical Modeling of an Air Gap Membrane Distillation Regenerator for Liquid Desiccant Air-Conditioning Applications
1 Introduction
2 Model Development
2.1 Heat and Mass Transfer Model
2.2 Performance Evaluation
3 Results and Discussion
3.1 Effects of Operation Temperatures
3.2 Effects of Flow Rates
3.3 Effects of Enhancement Factors for Heat Transfer
4 Conclusions
References
Assessing the Performance of Novel Dew Point Evaporative Cooler Considering the Climatic Conditions of Different Cities in Iraq
1 Introduction
2 New DPEC Design
3 Computational Approach
3.1 Mathematical Model
3.2 Numerical Procedure
4 Results and Discussion
4.1 Weather Data
4.2 Performance Assessment of Novel DPEC Under Climate Condition of Iraq
5 Conclusions
References
Energy Performance Analysis of Dew Point Evaporative Cooler with Novel Heat and Mass Exchanger Design
1 Introduction
2 System Description
3 Numerical Approach
3.1 Mathematical Model
3.2 Energy Performance Evaluation
3.3 Numerical Simulation Method
4 Results and Discussion
5 Summary and Conclusions
References
Atmospheric Crossflow
Interaction of an Elevated Low Velocity Ratio Turbulent Jet with Atmospheric Crossflow: An IDDES Study
1 Introduction
2 Numerical Framework
3 Results and Discussion
3.1 Mesh Convergence Study
3.2 Mean Flow Field
3.3 Instantaneous Flow Field
4 Conclusions
References
Biomedical
CFD Analysis of Different Cross-Sectional Areas of Sleep Apnea Patients Under Various Conditions
1 Introduction
2 Method
3 Subject
4 Numerical Modeling
5 Results and Discussion
5.1 Cross-Sectional Area
5.2 Turbulent Kinetic Energy
6 Conclusion
7 Future Work
References
Numerical Modeling of the Effects of Congestion in Human Lungs
1 Introduction
2 Dual Model
2.1 Global Equivalent Porous Medium Model
2.2 Local Representative Elemental Porous Medium Model
3 Mathematical Modelling
3.1 Global Equivalent Porous Medium Model
3.2 Local REV
3.3 Numerical Procedure
3.4 Model Validation
3.5 Grid Independence Study
4 Results and Discussion
4.1 Velocity Obtained from Global Model
4.2 Partial Pressure of Oxygen Entering the Bloodstream as Predicted by the Local Model
5 Conclusion
References
Numerical Study of Convection-Assisted Intra-Vitreous Drug Delivery in Human Eye
1 Introduction
2 Mathematical and Numerical Modelling
2.1 Eye Model and Thermophysical Properties
2.2 Conservation Equation
2.3 Initial Condition
2.4 Boundary Condition
2.5 Damage Integral Calculation
3 Numerical Methodology
3.1 Grid Generation and Grid Independence Study
4 Comparative Study
5 Results and Discussion
5.1 Steady State Results
5.2 Thermal Damage
6 Conclusions
References
Establishment of Dynamic Cell Freezing Model and Influence of Intracellular Freezing Curve
1 Introduction
2 Method
3 Results
3.1 Water Permeability Damage and Water Transport Model
3.2 Cell Freezing Model for Controlling Temperature Curves
4 Discussion
4.1 A Subsection Sample
References
Chemical Reactions, Combustion
Investigation of the Operating Flexibility of a CFB Furnace - Experimental Measurements and Dynamic Simulation
1 Introduction
2 1 MWth Circulating Fluidized Bed
3 Dynamic Process Simulation
4 Results
5 Conclusion
References
Relevance of Turbulence Modulation by Particles for the Simulation of a 60 kWth Swirling Flame of Pulverized Solid Fuel Under Oxy-Fuel Conditions
1 Introduction
2 Numerical Methodology
2.1 Simulations
3 Results and Discussion
References
Effect of Heat Generated by an Exothermic Chemical Reaction on the Mixed Convection Flow in a Vertical Porous Channel
1 Introduction
2 Mathematical Model
3 Solution Procedure
3.1 Energy Equation
3.2 Momentum Equations
4 Conclusion
References
Influence of Turbulence Modelling Approach on Characteristics of Premixed Jet Flames Doped with Ammonia
1 Introduction
1.1 Ammonia as a Fuel
1.2 Motivation
2 Experimental Setup
3 Methodology
3.1 Combustion Model
3.2 Numerical Setup
3.3 Selected Turbulence and Combustion Models
4 Results
4.1 A Comparison of Temperature and NO Dry Distributions for the Investigated Combustion Models Using RSM-LPS Turbulence Model
4.2 A Comparison of Temperature and NO Dry Distributions for the Investigated Turbulence Models Using EDC-M Combustion Model
5 Conclusions
References
A Comparative Study on Flame Length Using Numerical Analysis and Flame Visualization in Premixed Combustion
1 Introduction
2 Premixed Burner Design
2.1 Burner Design Concept
2.2 Burner Design
2.3 Simulation Model
2.4 Experimental Apparatus
3 Results
3.1 Flame Simulation Results
3.2 Flame Visualization Results
4 Conclusions
References
Comparative Analysis of Turbulence Models for Turbulent Non-premixed Combustion: A Hybrid Rocket Engine Case Study
1 Introduction
2 Analysis Methodology
2.1 Geometry and Boundary Conditions
2.2 Fuel Source Modelling
2.3 Mesh and Numerical Setup
3 Results and Discussion
4 Conclusions
References
Computational Analysis of Effect of Injection Angles in Strut Based Scramjet Combustor
1 Introduction
2 Numerical Methodology
2.1 Geometric Modelling
2.2 Numerical Modelling
2.3 Grid Independence Test
2.4 Boundary Conditions
2.5 Validation
3 Result and Discussion
3.1 The Effect of Wall-Static Pressure
4 Conclusion
References
A Numerical Study of Relaxation Phenomena in Microfluidic Reactive-Diffusive Systems
1 Introduction
2 Formulation and Mapping
3 Numerical Methods
4 Numerical Results
5 Conclusions
References
Numerical Simulation of Thermal Decomposition of Polyethylene with a Single-Particle Model
1 Introduction
2 Simulation Setups
3 Results and Discussions
3.1 Model Validation
3.2 Simulation of Plastic Pyrolysis at Isothermal Conditions
3.3 Correlation of Pyrolysis time with Pyrolysis Number
4 Conclusion
References
Investigation of Laminar Co-flow Ethylene Flames in Air Combustion at Near-Infrared Wavelengths: Fundamental Case
1 Introduction
2 Experimental Setups
3 Numerical Modelling
4 Results and Discussion
5 Conclusions
References
Conduction
Numerical Investigation of 2D Heat Transfer with Periodic Boundary Conditions
1 Introduction
2 The Problem with Periodic Boundary Conditions
3 Analytical Solution of the Problem
4 Numerical Method for Problem
4.1 Example-1
5 Conclusion
References
Numerical Estimation of Temperature-Dependent Thermal Properties
1 Introduction
2 Methods
2.1 Direct Thermal Model
2.2 The Quadrilateral Optimization Method (QOM)
2.3 Sensitivity Coefficients Calculus
2.4 Sensitivity Analysis
3 Time Steps Evaluation
4 Assessments
5 Conclusions
References
CPU and GPU Computational Performance Comparison Applied to Autogenous Welding Simulation
1 Introduction
2 Methodology
2.1 The Laser Beam Welding (LBW) Process
2.2 Mathematical Modeling
2.3 Moving Heat Source
2.4 Data Probe, Spatial and Temporal Mesh Independencies
2.5 Material Properties and Simulation Parameters
3 Results and Discussion
3.1 Temperature Fields
3.2 CUDA® vs Variable CPU Processing Nodes
3.3 Effect of Mesh Size in Processing Performance
3.4 Processing Hardware Energy Consumption
4 Conclusion
References
Estimation of Energy Transmission to Workpiece in Wire Electrical Discharge Machining Process
1 Introduction
2 Description of the Direct Problem
3 Inverse Methodology
4 Stopping Criteria
5 Results and Discussion
5.1 Case 1: Numerical Experiment with Simulated Temperature
5.2 Case 2: A Real-Time Experiment Utilising Temperature Data Acquired During the WEDM Process
6 Conclusion
References
Cooling
Numerical Investigation of the Cooling Zone of a Container Glass Annealing Furnace: Effect of the Circulation Fan Speed on the Cooling Effectiveness of the Furnace
1 Introduction
2 Numerical Methodology
2.1 Computational Furnace Domain
2.2 Numerical Solver and Computational Models
3 Results and Discussion
3.1 Furnace Temperature Distribution
3.2 Row Averaged Bottle Temperatures
3.3 Bottle Surface Temperatures
3.4 Radiative vs. Convective Heat Transfer Rate on the Bottles
3.5 Conclusion
References
Improving Skylight Geometry for Daytime Passive Radiative Cooling
1 Introduction
1.1 Passive Skylights for Daytime Cooling
2 Model Development
2.1 Simulation Setup: Geometry, Problem Domain, and Mesh
2.2 Mathematical and Physical Models
2.3 Choice of Radiative Heat Transfer Model
2.4 Material Properties
3 CFD Calculation Results and Discussion
3.1 Heat Transfer Analysis: Skylight Filled with CO2 as a Participating Medium
3.2 Skylight Filled with Weakly Participating Gas: Air
3.3 Skylight Filled with Strong Participating Gas: NH3
3.4 Skylight Filled with CO2 Gas with Top and Bottom ZnS Glasses
4 Further Investigations
5 Conclusion
References
Thermal Modeling and Optimization of an AC/DC Bidirectional Converter
1 Introduction
2 AC/DC Converter
3 Converter Thermal Modeling
3.1 CAD Model and Computational Mesh
3.2 Boundary Conditions and Simulation Model Setup
3.3 Material and Heat Generation in the Model
4 Numerical and Experimental Results
4.1 Numerical Results and Heat Sinks Candidates
4.2 Thermal Tests
4.3 Heatsink Preparation and Temperature Measurement
4.4 Junction Temperatures Estimation
4.5 Test Conditions
4.6 Results
5 Conclusion
References
Numerical Study of the Flow Distribution in Parallel Pipes of Water Cooling System of Diesel Locomotives
1 Introduction
2 Physical Modelling and Mathematical Formulation
3 Numerical Methods and Their Validation
3.1 Numerical Methods
3.2 Validation of Numerical Methods
4 Numerical Simulation Results and Discussion
4.1 Parallel Pipeline Flow Distribution Characteristics
4.2 The Flow Distribution After Incorporating Three Interceptors into the Distribution Box
4.3 The Flow Distribution After Incorporating Interceptor at Every Pipes Inlet
5 Conclusions
References
Numerical Investigation on Heat Transfer Performance of a Single-Phase Immersion Cooling System
1 Introduction
2 Methodology
2.1 Numerical Method
2.2 Grid Independence Verification
3 Results and Discussions
3.1 Effect of Non-uniform Heat Loads
3.2 Effect of Multi-PCB Arrangements
3.3 Effect of Flowrates and Inlet-Outlet Locations
3.4 Effect of Inlet Fluid Temperature
4 Conclusions
References
Development of a Fast-Running Approach for the Simulation of Debris Beds in the Nuclear Severe Accident Analysis Code AC2
1 Introduction
2 Description of the Model
3 Description and Modelling of the DEBRIS Test Facility
4 Results and Discussion
5 Conclusion
References
Numerical Analysis of Multi-zone Trench Cooling on an Adiabatic Flat Plate for Gas Turbine Application
1 Introduction
2 Methodology
2.1 Computational Model
2.2 Governing Equations
2.3 Boundary Conditions
2.4 Numerical Computations
3 Results and Discussion
3.1 Wall Temperature Profile
3.2 Streamwise Variation in Film Cooling Effectiveness
4 Conclusions
References
Development of a Passive Cooling System for a Gearless Wind Energy Generator
1 Passive Cooling for Next Generation Wind Turbines
1.1 New Design of a Gearless Generator
1.2 Model Segment of the Cooling Fins
2 Numerical Simulation
2.1 Full Size Fluid Flow Model
2.2 Heat Transfer with Fluid Solid Interaction (FSI)
3 Experiments
3.1 Setup as Full-Size Test Rig
3.2 Dynamic Waste Heat Examination
4 Conclusions and Acknowledgments
References
Simulation Assisted Implementation of Radiative Cooling Materials to Grid-eMotion Flash Charging Units
1 Introduction
2 Requirements
3 Radiative Cooling
4 Proposed Solution
5 Measurements and Testing of Coatings
6 Thermal Test Using Demo Box
6.1 Test Setup
6.2 Test Results
7 Thermal Simulations of Demo Box
7.1 Simulation Model Setup
7.2 Simulation Results
8 Conclusions
References
Conjugate/Coupled
Numerical Analysis of the Heating Zone of a Container Glass Annealing Furnace: Effect of Circulation Fan Speed on the Heating Effectiveness of the Furnace
1 Introduction
2 Numerical Methodology
2.1 Computational Furnace Domain
2.2 Numerical Solver and Computational Models
2.3 Convergence Monitoring
3 Results and Discussion
3.1 Inner Furnace Walls Temperatures
3.2 Row Averaged Bottle Temperatures
3.3 Bottle Surface Temperatures
3.4 Radiative vs. Convective Heat Transfer Rate on the Bottles
3.5 Heat Transfer Contributions on the Bottles: Side vs. Centerline
3.6 Conclusion
References
Design of the Cooling System of the Cavity of the European Gyrotron Using Adjoint-Based Topology Optimization Exploiting the Azimuthal Flow Direction
1 Introduction and Aim of the Study
2 Adjoint-Based Topology Optimization
3 Optimization Problem Setup
4 Optimization Results
5 Flow Field and Thermal Analysis with a Body-Fitted Mesh
6 Conclusions and Perspective
References
Induction Heating Finite-Volume Simulations for Cooking Applications
1 Introduction
2 Numerical Model
2.1 Electromagnetics
2.2 Heat Transfer
3 Numerical Experiments
4 Conclusion
References
A Time-Efficient Loosely Coupled Fluid-Thermal Analysis Strategy on Dynamic Flight Trajectories
1 Introduction
2 Aerodynamic Heating Modeling Strategy
2.1 Coupling Methodology
2.2 Loosely Coupled Approach
2.3 Analysis Process
3 Results and Discussion
3.1 von-Karman Nose Shaped Missile
3.2 15° Cone-Cylinder-Flare (CCF) Configuration Missile
4 Conclusions
References
Investigation of Nonlinear Aerothermoelastic Characteristics of the Deployable Control Fin Using Tightly Coupled Fluid-Thermal-Structural Interaction Analysis
1 Introduction
2 Problem Definition
3 Methodology
4 Validation
5 Results and Discussion
5.1 Grid Independence Study
5.2 Structural Characteristics
5.3 Aerodynamic Characteristics
6 Conclusion
References
Development of a Three-Dimensional CFD Model to Determine Convective Heat Transfer During Orthogonal Cutting
1 Introduction
2 Simulation Setup
2.1 FEM
2.2 CFD
3 Results
4 Conclusion and Outlook
References
The Effect of Spring Stiffness on Dynamic Characteristics of Interconnected Pilot Valves in the Steam Valve Set
1 Introduction
2 Numerical Method
2.1 Geometry Model and Working Condition
2.2 Mesh Generation
2.3 Computation Model
2.4 Model Validation
3 Results and Discussion
3.1 The Critical Range of Research Variables in Stable and Unstable Regions
3.2 The Influence of Spring Stiffness on Dynamic Characteristics of VS66 Pilot Valve Under the Stable Region
3.3 The Influence of Spring Stiffness on Dynamic Characteristics of NICO Pilot Valve Under the Stable Region
4 Conclusion
References
Desalination
Modelling and Simulation of Solar Desalination Based on Multiple Effect Distillation Process in Saudi Arabia
1 Introduction
2 Modeling of the MED and PTC Systems
3 Results and Discussion
4 Conclusions
References
Heat and Mass Transfer in a Vacuum Membrane Distillation for Water Desalination
1 Introduction
2 Mathematical Model
3 Numerical Method and Validation
4 Results and Discussion
5 Conclusions
References
Energy Storage
Enhancing the Performance of Latent Heat Thermal Energy Storage using Different Configurations and Designs of Heat Transfer Pipes
1 Introduction
2 Methodology
2.1 Mathematical Formulation
2.2 Time Invariant Conditions
2.3 Geometry and Boundary Conditions
2.4 Numerical Solver
2.5 Grid and Time Step Independence
2.6 Validation
3 Results and Discussion
4 Conclusions
References
A Novel Study on Energy Storage Potential of an All-Day Radiative Sky Cooling Radiator Assisted by U-Shaped Ground Heat Exchanger
1 Introduction
2 Heat Transfer Model Establishment
2.1 UGHE Assisted-RSCR System (URS)
2.2 Description and Modelling of RSCR
2.3 Model Description and Establishment of UGHE
3 Model Verifications
4 Calculation Description
4.1 Weather Conditions in Hong Kong
4.2 Reflectance of Cooling Coating
5 Evaluation of Cooling Capacities of URSCR
5.1 Influences of M on Cooling Potentials
5.2 Annual Variations
6 Conclusions
References
Charging and Discharging of Hydrogen Sorption Storage Tank
1 Introduction
1.1 Hydrogen Storage
1.2 Modelling Adsorption Storage
1.3 Problem Description
2 Model
2.1 Flow in Tank
2.2 Adsorption Model
3 Results
3.1 Machine Learning
3.2 Validation
3.3 Charging and Discharging
4 Discussion
4.1 Summary
4.2 Outlook
References
Thermal Management of Lithium Titanium Oxide Batteries: A Numerical Study
1 Introduction
2 Literature Review
2.1 Lithium Titanium Oxide Cells
2.2 Heat Generation in Lithium Ion Batteries
3 Computational Modelling
4 Methodolody
4.1 Battery Pack
4.2 Governing Equations
4.3 Initial and Boundary Conditions
5 Formulation Study
5.1 Grid Independence Study
5.2 Validation Study
6 Results and Discussion
7 Conclusion
References
A One-Dimensional Model and the Influence of the Mass Flow Rate in a Structured Thermal Energy Storage System for Concentrated Solar Power Plants
1 Introduction
2 Methodology
2.1 Case Geometry
2.2 Governing Equations
2.3 Main Parameters for the Reference Case
3 Results and Discussion
3.1 Validation Case
3.2 Accumulated Energy
3.3 Outlet Temperature
3.4 Exergy Discharged as Performance Evaluation Criteria
4 Conclusions
References
Numerical Evaluation of Moisture Effects on the Underground Thermal Storage System
1 Introduction
2 Mathematical Description of the Coupled Model
2.1 Transport Equations
2.2 Parameter Functions
2.3 Partial Differential Equations
2.4 Boundary Conditions
3 Validation of the Non-insulated Tank Model
4 Conclusions
References
Food Drying
Improving Velocity and Temperature Uniformity in Multi-sample Drying Using CFD Integrated Drying Model
1 Introduction
2 Mathematical Modelling
2.1 Governing Equations and Boundary Conditions
2.2 Simulation Procedure
3 Result and Discussion
3.1 Air Velocity Distribution
3.2 Effect of Air Velocity
3.3 Effect of Sample Orientation
3.4 Effect of Sample Position
3.5 Coefficient of Variance
4 Conclusions
References
Forced Convection
Numerical Study of Submerged Impinging Water Jets Under High Heat Flux for Laminar Flow Conditions
1 Introduction
2 Numerical Model
2.1 Physical Model
2.2 Governing Equations and Boundary Conditions
2.3 Data Reduction
2.4 Validation of Numerical Results
3 Results and Discussion
4 Conclusions
References
Numerical Study on Heat Transfer from a Square Pipe Nozzle Impinging Jet with Square Air-Augmented Duct
1 Introduction
2 Numerical Methodology
2.1 Computational Model, Governing Equations and Boundary Conditions
2.2 Data Reduction
2.3 Grid Independency Study and Validation of Numerical Results
3 Results and Discussion
4 Conclusions
References
Heat Transfer Decay Characteristics Downstream of a Vortex Generator
1 Introduction
2 Physical Model and Mathematics Formulation
2.1 Physical Model
2.2 Mathematics Formulation
3 Numerical Method and Its Validation
4 Results and Discussion
4.1 Flow Structure and Temperature Distribution
4.2 Effect of Re on the Heat Decay Characteristics Downstream of DWVG
5 Conclusion
References
The Intensity of Secondary Flow in a Channel of Spiral Plate Heat Exchanger
1 Introduction
2 Physical Models and Mathematical Formulations
3 Numerical Methods and Their Validation
3.1 Numerical Methods
3.2 Validation of Numerical Methods
4 Numerical Simulation Results and Discussion
4.1 The Intensity of Secondary Flow Produced by Görtler Vortices
4.2 The Parameter Effects on the Intensity of Secondary Flow
5 Conclusion
References
Mechanism of Heat Transfer Enhancement by Secondary Flow in a Helically Coiled Circular Tube
1 Introduction
2 Models and Methods
3 Results and Discussion
3.1 Heat Flux Convective Transport Equation
3.2 Contributions of Velocity and Velocity Gradient to Heat Transfer Under UWT
3.3 Contributions of Velocity and Velocity Gradient to Heat Transfer Under UWHF
4 Conclusion
References
Analysis of the Forced Convection of the Exchanger on the Example of an Induction Unit
1 Introduction
2 Research Methods
2.1 Experimental Setup
2.2 Calculation Methodology
3 Results and Discussion
4 Discussion
5 Conclusion
References
Fuel Cells
Comparison of the Three-Generation Numerical Models for Proton Exchange Membrane Fuel Cell Multi-physics Prediction
1 Introduction
1.1 Simplified Simulation Model
1.2 Complete Coupling Simulation Model
2 Methodology Comparison
2.1 First Generation Model
2.2 Second Generation Model
2.3 Third Generation Model
3 Result Comparison and Discussion
4 Conclusion
References
Influence of Liquid Water Distribution on PEM Fuel Cell Performance Using Cathode-Anode Model: A 3D Numerical Study
1 Introduction
2 Numerical Model
2.1 Boundary Conditions
3 Numerical Procedure, Grid Independence and Model Validation
4 Results and Discussion
4.1 Cell Operating Temperature
4.2 Stoichiometric Ratios (Anode/Cathode)
5 Conclusions
References
Quasi-3D Modeling of Solid Oxide Fuel Cells for Combined Degradation Study
1 Introduction
2 Numerical Modeling
2.1 Governing Equations
2.2 Degradation Model
2.3 Calculation Condition
3 Results and Discussion
3.1 Chromium Poisoning
3.2 YSZ Phase Transformation
3.3 Interconnector Oxidation
3.4 Combined Degradation
4 Conclusion
References
Prediction of the Water Distribution in Randomly Packed Hollow Fibre Humidifiers Using Artificial Neural Networks as Surrogate Models
1 Introduction
2 Modelling
3 Training and Testing of the U-Nets
4 Conclusion and Outlook
References
Effect of Cooling Flow Channels on the In-plane Temperature Distribution in PEMFC
1 Introduction
2 Model Description
2.1 Computational Domain
2.2 Governing Equation and Boundary Condition
2.3 Numerical Procedure
3 Results and Discussion
3.1 Model Validation
3.2 Effect of Channel and Rib Width
3.3 Novel Design
4 Conclusion
References
Heat Pipes
Dynamic Operation Modeling of Flat-Plate Pulsating Heat Pipes for Power Electronic Applications
1 Introduction
2 Experimental Setup
3 Numerical Models
3.1 3D-FEA Model
3.2 System-Identification Approach
4 Results and Discussion
4.1 Dynamic Driving Situation
5 Conclusion
6 Appendix: Material Properties and Solver Settings
References
Accelerated Solution Methodology for 3D Hydrodynamic and Thermal Modeling of Grooved Heat Pipes with Complex Geometries
1 Introduction
2 Modeling Methodology
3 Results and Discussion
4 Conclusions
References
Heat Transfer Enhancement
Effect of Dimpled Surfaces on Convective Heat Transfer and Friction Factor in a Rectangular Channel
1 Introduction
2 Problem Definition
3 Numerical Setup
4 Results and Discussion
4.1 Nutotal and Nutotal/Nuo
4.2 f and f/fo
5 Conclusions
References
Comparative Assessment of Flow Patterns and Hydrodynamics in Cylindrical and Hourglass-Shaped Pin-Fin Configurations
1 Introduction
2 Methodology
2.1 Pin-Fin Arrangement
2.2 Assumptions, Boundary Conditions and Numerical Models
2.3 Validation of the Computational Model
2.4 Vortex Identification: Omega Criteria and Critical Points Theory
3 Results and Discussion
3.1 Pressure Drop
3.2 Flow Patterns
4 Conclusions
References
Transition Flow Heat Transfer and Pressure Drop in a Uniformly Heated Inclined Solar Air Heater Fitted with Wavy Tapes
1 Introduction
2 Experimental Setup
3 Set of Experiments
4 Data Reduction
5 Results and Discussion
5.1 Validation of Study
5.2 Heat Transfer
5.3 Pressure Drop
6 Conclusions
References
Numerical Analysis of Roughened Target Surface for Enhancing Jet Impingement Cooling
1 Introduction
2 Physical Model Details
3 Results and Discussion
3.1 Average Nusselt Numbers
3.2 Local Heat Transfer
4 Conclusions
References
Indoor Flows, Ventilation
URANS and DNS of a Cough-Induced Aerosol-Laden Jet Flow Interacting with a Large-Scale Circulation
1 Introduction
2 Governing Equations
3 Numerical Details
4 Results
5 Conclusion and Discussion
References
Analysis of the Effect of Boundary Conditions in Airborne Contagion Risk in a Naturally Ventilated Classroom via Large Eddy Simulation
1 Introduction
2 Methodology
2.1 Case Description
2.2 CFD Framework
2.3 Risk Assessment Methodology
3 Results and Discussion
3.1 Risk Assessment
3.2 Flow Patterns
4 Conclusions
References
Indoor Airflow Simulation with CHAMÁN Code: Towards a Validated Setup
1 Introduction
2 Methodology
2.1 Experimental Data
2.2 Flow Solver
2.3 Simulation Settings
3 Results
4 Conclusions
References
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