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A new calculation method is presented for heat transfer in coupled convective-conductive fluid-wall systems under periodical intensity oscillations in fluid flow. It is demonstrated that the true steady-state mean value of the heat transfer coefficient has to be multiplied by a newly defined coupling factor. This correction factor is always smaller than one and depends on the coupling parameters Biot number, Fourier number as well as dimensionless geometry and oscillation parameters. For characteristic periodic heat transfer problems, analytical solutions are given for the coupling factor. To facilitate engineering application, the monograph also presents the analytical results in accompanying tables and diagrams.

Engineering. --- Thermodynamics. --- Electric power production. --- Physical measurements. --- Measurement. --- Computational intelligence. --- Heat engineering. --- Heat transfer. --- Mass transfer. --- Engineering Thermodynamics, Heat and Mass Transfer. --- Energy Technology. --- Computational Intelligence. --- Measurement Science and Instrumentation. --- Engineering, general. --- Mass transport (Physics) --- Thermodynamics --- Transport theory --- Heat transfer --- Thermal transfer --- Transmission of heat --- Energy transfer --- Heat --- Mechanical engineering --- Intelligence, Computational --- Artificial intelligence --- Soft computing --- Measuring --- Mensuration --- Mathematics --- Technology --- Metrology --- Physical measurements --- Measurements, Physical --- Mathematical physics --- Measurement --- Electric power generation --- Electricity generation --- Power production, Electric --- Electric power systems --- Electrification --- Chemistry, Physical and theoretical --- Dynamics --- Mechanics --- Physics --- Heat-engines --- Quantum theory --- Construction --- Industrial arts --- Transmission. --- Conduction. --- Convection. --- Convection of heat --- Conduction of heat --- Energy Systems. --- Energy systems. --- Measurement   .

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This thesis studies the general heat conduction law, irreversible thermodynamics and the size effect of thermal conductivity exhibited in nanosystems from the perspective of recently developed thermomass theory. The derivation bridges the microscopic phonon Boltzmann equation and macroscopic continuum mechanics. Key concepts such as entropy production, temperature and the Onsager reciprocal relation are revisited in the case of non-Fourier heat conduction. Lastly, useful expressions are extracted from the picture of phonon gas dynamics and are used to successfully predict effective thermal conductivity in nanosystems.

Thermodynamics --- Physics --- Physical Sciences & Mathematics --- Heat --- Thermal conductivity. --- Nanotechnology. --- Conduction. --- Transmission. --- Molecular technology --- Nanoscale technology --- Coefficient of conductivity --- Conductivity, Heat --- Conductivity, Thermal --- Heat conductivity --- Heat transfer --- Thermal transfer --- Transmission of heat --- Conduction of heat --- High technology --- Transport theory --- Energy transfer --- Conduction --- Measurement --- Thermodynamics. --- Engineering. --- Engineering Thermodynamics, Heat and Mass Transfer. --- Complex Systems. --- Nanotechnology and Microengineering. --- Nanoscale Science and Technology. --- Chemistry, Physical and theoretical --- Dynamics --- Mechanics --- Heat-engines --- Quantum theory --- Construction --- Industrial arts --- Technology --- Heat engineering. --- Heat transfer. --- Mass transfer. --- Statistical physics. --- Dynamical systems. --- Nanoscale science. --- Nanoscience. --- Nanostructures. --- Nanoscience --- Nano science --- Nanoscale science --- Nanosciences --- Science --- Dynamical systems --- Kinetics --- Mathematics --- Mechanics, Analytic --- Force and energy --- Statics --- Mathematical statistics --- Mass transport (Physics) --- Mechanical engineering --- Statistical methods

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This book presents the theory of periodic conjugate heat transfer in a detailed way. The effects of thermophysical properties and geometry of a solid body on the commonly used and experimentally determined heat transfer coefficient are analytically presented from a general point of view. The main objective of the book is a simplified description of the interaction between a solid body and a fluid as a boundary value problem of the heat conduction equation for the solid body. At the body surface, the true heat transfer coefficient is composed of two parts: the true mean value resulting from the solution of the steady state heat transfer problem and a periodically variable part, the periodic time and length to describe the oscillatory hydrodynamic effects. The second edition is extended by (i) the analysis of stability boundaries in helium flow at supercritical conditions in a heated channel with respect to the interaction between a solid body and a fluid; (ii) a periodic model and a method of heat transfer simulation in a fluid at supercritical pressure and (iii) a periodic quantum-mechanical model for homogeneous vapor nucleation in a fluid with respect to nanoscale effects.

Heat -- Conduction. --- Heat -- Convection. --- Heat -- Transmission. --- Heat --- Physics --- Mechanical Engineering --- Engineering & Applied Sciences --- Physical Sciences & Mathematics --- Thermodynamics --- Mechanical Engineering - General --- Transmission --- Conduction --- Convection --- Transmission. --- Conduction. --- Convection. --- Conduction of heat --- Engineering. --- Energy systems. --- Thermodynamics. --- Physics. --- Electric power production. --- Applied mathematics. --- Engineering mathematics. --- Heat engineering. --- Heat transfer. --- Mass transfer. --- Engineering Thermodynamics, Heat and Mass Transfer. --- Appl.Mathematics/Computational Methods of Engineering. --- Energy Technology. --- Energy Systems. --- Applied and Technical Physics. --- Convection of heat --- Heat transfer --- Thermal transfer --- Transmission of heat --- Energy transfer --- Mathematical and Computational Engineering. --- Chemistry, Physical and theoretical --- Dynamics --- Mechanics --- Heat-engines --- Quantum theory --- Engineering --- Engineering analysis --- Mathematical analysis --- Construction --- Industrial arts --- Technology --- Mathematics --- Natural philosophy --- Philosophy, Natural --- Physical sciences --- Mass transport (Physics) --- Transport theory --- Mechanical engineering