Presented in ten edited chapters this book encompasses important emerging topics in heat transfer equipment, particularly heat exchangers. The chapters have all been selected by invitation only. Advances in high temperature equipment and small scale devices continue to be important as the involved heat transfer and related phenomena are often complex in nature and different mechanisms like heat conduction, convection, turbulence, thermal radiation and phase change as well as chemical reactions may occur simultaneously. The book treats various operating problems, like fouling, and highlights applications in heat exchangers and gas turbine cooling. In engineering design and development, reliable and accurate computational methods are required to replace or complement expensive and time consuming experimental trial and error work. Tremendous advancements in knowledge and competence have been achieved during recent years due to improved computational solution methods for non-linear partial differential equations, turbulence modelling advancement and developments of computers and computing algorithms to achieve efficient and rapid simulations.The chapters of the book thoroughly present such advancement in a variety of applications.

Table of Contents:
Contents CHAPTER 1 Gas-Side Fouling of Fin Surfaces in Exhaust Gas Recirculators Introduction; Dry Soot Deposition in Fin Passages; Mathematical model; Ge-ometry and computational grid; Simulation conditions and postprocessing; Relative magnitude of particle forces at EGR conditions; Results; Expressions for the correlations; Reduced-order modeling of fouling in EGR; Dry soot fouling layer characterization; Wet soot fouling layer characterization; Fouling layer removal; Conditions; Results and discussion; Summary and Conclusions; Acknowledgments; References CHAPTER 2 Heat Transfer Enhancement by Turbulent Impinging Jets and Ribbed Channel Flows Introduction; Impinging jet; Turbulence models; Experimental Study; Mathe-matical and Physical Model; Governing equations; Near-wall turbulence mod-els for high Reynolds; The k - turbulence model; The Reynolds stress turbu-lence model; Heat transfer model; Numerical Solution Procedure; Results and Discussion; Impinging jets; Ribbed-channel flows; Large eddy simulation; Conclusion; References CHAPTER 3 Heat Transfer Enhancement of a Gas Turbine Blade-Tip Wall Introduction; Physical Models of Eight Kinds of Tip-Cooling Concepts; Com-putational Details; Selection of turbulence model; Grid dependence; Boundary conditions; Fluid Flow and Heat Transfer Characteristics; Definitions of fric-tion factor and Nusselt number; Model validation; Flow and temperature fields; Pressure drop and heat transfer; Overall Comparisons of Tip-Cooling Concepts; Concluding Remarks; Acknowledgments; Nomenclature; Refer-ences CHAPTER 4 Shell-and-Tube Heat Exchangers with Helical Baffles Introduction; Flow and Heat Transfer Enhancement Mechanism of Helix-changers; Flow characteristics of helixchangers; Heat transfer enhancement mechanism of helixchangers; STHXs with Discontinuous Helical Baffles; Structure of the discontinuous helical baffles; Flow and heat transfer perform-ance; Shell Side Design method for STHXs; Single Shell-Pass STHXs with Continuous Helical Baffles; Structure of the Continuous Helical Baffles; Flow and heat transfer performance of continuous helical baffled heat exchangers; Maximal velocity ratio design method; Effect of the inlet and outlet locations; Applications example; Single Shell-Pass STHXs with Combined Helical Baf-fles; Structure of the combined helical baffles; Flow streamlines; Flow and heat transfer performance; Maximal velocity ratio; Combined Multiple Shell-Pass STHXs with Helical Baffles; Structure of the combined multiple shell-pass SHTXs with helical baffles; Flow and heat transfer performance; Con-cluding Remarks; Acknowledgments; References CHAPTER 5 Compact Metallic High-Temperature Heat Exchangers Introduction; Primary Surface Recuperator; Numerical investigation of heat transfer and pressure drop performances of CW primary surface recuperator; Stress and creep analysis of CW primary surface recuperator; Experimental investigation of heat transfer and pressure drop performances of primary surface recuperator; Bayonet Tube Heat Exchanger with Inner and Outer Fins; Design of Bayonet tube heat exchanger with inner and outer fins; Numerical investigation of heat transfer and pressure drop performances of bayonet tube HTHE; Stress analysis of bayonet tube HTHE; Experimental study of pressure drop and heat transfer performances of bayonet tube HTHE; Concluding Remarks; Acknowledgments CHAPTER 6 Turbulent Heat Transfer Performance of Internally Longitudinally Fin-ned Tubes Introduction; Physical Model; Experimental Apparatus; Data Reduction in Experiment; Numerical Model for Turbulence Flow; Turbulence Model; Re-sults and Discussion; Validation of numerical model and grid independence; Optimal ratio of blocked core-tube outer diameter to - outer-tube inner diameter (do/Di); Effect of lateral fin profiles; Effect of differ-ent longitudinal fins; Correlations of periodic wavy channel of internally fin-ned tube; Conclusion; Acknowledgments; Nomenclature; Greek symbols; Subscripts; References CHAPTER 7 Air-Side Heat Transfer and Friction Characteristics of Fin-and-Tube Heat Exchangers with Various Fin Types Introduction; Heat Transfer Performances of the Fin Patterns for Circular Tube; Heat Transfer Performances of the Fin Patterns for Flat Tube; Conclu-sion; Acknowledgments; Nomenclature; Greek symbols; Subscripts; Refer-ences CHAPTER 8 High-Temperature Heat Exchanger and Decomposer Design Introduction; IHX requirements; Helium gas properties; FLiNaK properties; Numerical Modeling of the Baseline HTHX Designs; Design including manu-facturing geometrical effects; Analytical calculations; Numerical simulation of the offset strip fin heat exchanger with no gap in flow direction (Px = l); Shell and Plate HTHX and Decomposer Design and Operation Conditions; Fluid flow model validation; Heat transfer model validation; Chemical reaction model validation; Improved design with hexagonal channels; Calculation of heat transfer and flow features of heat exchanger and decomposer; Modeling of Flow with Chemical Reactions; Geometry and boundary conditions; Mate-rial properties; Calculation results of the baseline design; Parametric study of the baseline design; Calculation results of the alternative designs and compari-son with baseline design results; Stress analysis; Conclusions; References CHAPTER 9 Design Optimization and Performance Prediction of Compact Heat Exchangers Introduction; Design Optimization of a Plate-Fin Heat Exchanger; Physical model; Brief description of GA and optimization process; Optimization results and discussion; Performance Prediction of Tube-Fin Heat Exchangers; Physi-cal model and experimental database; Brief description of ANN; Prediction of turbulent flow and heat transfer; Prediction of laminar flow and heat transfer; Concluding Remarks; References CHAPTER 10 Flow Boiling in Small to Microdiameter Tubes Introduction; Applications of Microchannels Heat Exchangers; Refrigeration and air conditioning; Electronics cooling; Micro scale flow boiling issues; Ex-perimental Facility and Data Reduction; Effect of Diameter on Flow Patterns; Pressure Drop Characteristics; Heat Transfer Characteristics; Heat transfer mechanism(s); Effect of system pressure; Effect of tube diameter; Effect of surface characteristics; Flow instability; Effect of heated length; Heat transfer prediction; Empirical correlations; Mechanistic models; Pressure Drop Predic-tion; Empirical correlations; Mechanistic models; Conclusions; Acknowl-edgement; Nomenclature; Greek symbols; Subscripts; References