{"title":"Nikolay Ivanov Kolev","description":null,"products":[{"product_id":"multiphase-flow-dynamics-5-book-nikolay-ivanov-kolev-9783319151557","title":"Multiphase Flow Dynamics 5","description":"Heat Release in the Reactor Core.- Temperature Inside the Fuel Elements.- The Simple Steady Boiling Flow in A Pipe.- The Simple Steady Three-Fluid Boiling Flow in A Pipe.- Core Thermal Hydraulics.- Flow Boiling and Condensation Stability Analysis.- Critical Multiphase Flow.- Steam Generators.- Moisture Separation.- Pipe Networks.- Some Auxiliary Systems.- Emergency Condensers, Reheaters, Moisture Separators and Reheaters.- Core Degradation.- Melt-Coolant Interaction.- Coolability of Layers of Molten Reactor Material.- External Cooling of Reactor Vessels During Severe Accident.- Thermo-Physical Properties for Severe Accident Analysis.- Lead, Bismuth and Lead-Bismuth Eutectic Alloy.- Containment Thermal-Hydraulics.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ GARDNERS","offer_id":49736748335377,"sku":"NGR9783319151557","price":0.0,"currency_code":"GBP","in_stock":false},{"title":"US \/ NEW \/ INGRAM","offer_id":51142557958417,"sku":"NIN9783319151557","price":0.0,"currency_code":"GBP","in_stock":false},{"title":"GB \/ NEW \/ INGRAM","offer_id":52126367285521,"sku":"NLS9783319151557","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/331915155X.jpg?v=1750902396"},{"product_id":"multiphase-flow-dynamics-3-book-nikolay-ivanov-kolev-9783642213717","title":"Multiphase Flow Dynamics 3","description":"This volume presents an introduction to thermal interactions in multiphase flow. This state-of-the-art review features a selection of the best available approaches for describing interfacial transfer processes.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52142603010321,"sku":"NLS9783642213717","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783642213717.jpg?v=1757580994"},{"product_id":"multiphase-flow-dynamics-4-book-nikolay-ivanov-kolev-9783642207488","title":"Multiphase Flow Dynamics 4","description":"Now in a fresh updated and extended edition, this third volume of the series on multiphase flow dynamics focuses on turbulence and includes the basics of the single-phase boundary layer theory including important scales and flow oscillation characteristics.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52142604845329,"sku":"NLS9783642207488","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":52761799131409,"sku":"NIN9783642207488","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783642207488.jpg?v=1757581004"},{"product_id":"multiphase-flow-dynamics-1-book-nikolay-ivanov-kolev-9783319152950","title":"Multiphase Flow Dynamics 1","description":"In its fifth extended edition the successful monograph package Multiphase Flow Dynamics contains theory, methods and practical experience for describing complex transient multi-phase processes in arbitrary geometrical configurations, providing a systematic presentation of the theory and practice of numerical multi-phase fluid dynamics.","brand":"WoB","offers":[{"title":"- \/ - \/ INTERNAL","offer_id":52337462116625,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true},{"title":"GB \/ NEW \/ INGRAM","offer_id":52337462575377,"sku":"NLS9783319152950","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783319152950.jpg?v=1758166724"},{"product_id":"multiphase-flow-dynamics-4-book-nikolay-ivanov-kolev-9783642434549","title":"Multiphase Flow Dynamics 4","description":"The present Volume 4 of the successful monograh package “Multiphase Flow Dynamics”is devoted to selected Chapters of the multiphase fluid dynamics that are important for practical applications but did not find place in the previous volumes. The state of the art of the turbulence modeling in multiphase flows is presented. As introduction, some basics of the single phase boundary layer theory including some important scales and flow oscillation characteristics in pipes and rod bundles are presented. Then the scales characterizing the dispersed flow systems are presented. The description of the turbulence is provided at different level of complexity: simple algebraic models for eddy viscosity, simple algebraic models based on the Boussinesq hypothesis, modification of the boundary layer share due to modification of the bulk turbulence, modification of the boundary layer share due to nucleate boiling. The role of the following forces on the mathematical description of turbulent flows is discussed: the lift force, the lubrication force in the wall boundary layer, and the dispersion force. A pragmatic generalization of the k-eps models for continuous velocity field is proposed containing flows in large volumes and flows in porous structures. A Methods of how to derive source and sinks terms for multiphase k-eps models is presented. A set of 13 single- and two phase benchmarks for verification of k-eps models in system computer codes are provided and reproduced with the IVA computer code as an example of the application of the theory. This methodology is intended to help other engineers and scientists to introduce this technology step-by-step in their own engineering practice.  In many practical application gases are solved in liquids under given conditions, released under other conditions and therefore affecting technical processes for good of for bad. Useful information on the solubility ofoxygen, nitrogen, hydrogen and carbon dioxide in water under large interval of pressures and temperatures is collected, and appropriate mathematical approximation functions are provided. In addition methods for the computation of the diffusion coefficients are described. With this information solution and dissolution dynamics in multiphase fluid flows can be analyzed. For this purpose the non-equilibrium absorption and release on bubble, droplet and film surfaces under different conditions is mathematically described.   A systematic set of internally consistent state equations for diesel fuel gas and liquid valid in broad range of changing pressure and temperature is provided.  This new second edition includes various updates, extensions, improvements and corrections.       In many practical application gases are solved in liquids under given conditions, released under other conditions and therefore affecting technical processes for good of for bad. Useful information on the solubility of oxygen, nitrogen, hydrogen and carbon dioxide in water under large interval of pressures and temperatures is collected, and appropriate mathematical approximation functions are provided. In addition methods for the computation of the diffusion coefficients are described. With this information solution and dissolution dynamics in multiphase fluid flows can be analyzed. For this purpose the non-equilibrium absorption and release on bubble, droplet and film surfaces under different conditions is mathematically described.   A systematic set of internally consistent state equations for diesel fuel gas and liquid valid in broad range of changing pressure and temperature is provided.  This new second edition includes various updates, extensions, improvements andcorrections.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52341582168337,"sku":"NLS9783642434549","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783642434549.jpg?v=1758171905"},{"product_id":"multiphase-flow-dynamics-2-book-nikolay-ivanov-kolev-9783642446016","title":"Multiphase Flow Dynamics 2","description":"Volume 2 is devoted to the important constitutive relations for mathematical description of the mechanical and thermal interactions. The emphasis is on the practical use of these relationships, and this edition includes updates, extensions and improvements.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52344296177937,"sku":"NLS9783642446016","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783642446016.jpg?v=1758174493"},{"product_id":"multiphase-flow-dynamics-1-book-nikolay-ivanov-kolev-9783319342559","title":"Multiphase Flow Dynamics 1","description":"In its fifth extended edition the successful monograph package “Multiphase Flow Dynamics” contains theory, methods and practical experience for describing complex transient multi-phase processes in arbitrary geometrical configurations, providing a systematic presentation of the theory and practice of numerical multi-phase fluid dynamics. In the present first volume the local volume and time averaging is used to derive a complete set of conservation equations for three fluids each of them having multi components as constituents. Large parts of the book are devoted on the design of successful numerical methods for solving the obtained system of partial differential equations. Finally the analysis is repeated for boundary fitted curvilinear coordinate systems designing methods applicable for interconnected multi-blocks.  This fifth edition includes various updates, extensions, improvements and corrections, as well as a completely new chapter containing the basic physics describing the multi-phase flow in turbines, compressors, pumps and other rotating hydraulic machines.","brand":"WoB","offers":[{"title":"- \/ - \/ INTERNAL","offer_id":52434523783441,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true},{"title":"GB \/ NEW \/ INGRAM","offer_id":52434524602641,"sku":"NLS9783319342559","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783319342559.jpg?v=1759180849"},{"product_id":"multiphase-flow-dynamics-3-book-nikolay-ivanov-kolev-9783642090622","title":"Multiphase Flow Dynamics 3","description":"In order to allow the application of the theory from all the three volumes also to processes in combustion engines a systematic set of internally consistent state equations for diesel fuel gas and liquid valid in broad range of changing pressure and temperature are provided also in Volume 3.   Erlangen, October 2006 Nikolay Ivanov Kolev  Table of contents 1 Some basics of the single-phase boundary layer theory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1. 1 Flow over plates, velocity profiles, share forces, heat transfer. . . . . . . . . . . . . . . . . . . . 1 1. 1. 1 Laminar flow over the one site of a plane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1. 1. 2 Turbulent flow parallel to plane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1. 2 Steady state flow in pipes with circular cross sections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1. 2. 1 Hydraulic smooth wall surface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1. 2. 2 Transition region. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1. 2. 3 Complete rough region. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1. 2. 4 Heat transfer to fluid in a pipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1. 3 Transient flow in pipes with circular cross sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 21 Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 2 Introduction to turbulence of multi-phase flows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 2. 1 Basic ideas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 2. 2 Isotropy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 2. 3 Scales, eddy viscosity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 2. 3. 1 Small scale turbulent motion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 2. 3. 2 Large scale turbulent motion, Kolmogorov-Pandtl expression. . . . . . . . . 42 2. 4 k-eps framework. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . 48 References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3 Sources for fine resolution outside the boundary layer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 3. 1 Bulk sources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 3. 1. 1 Deformation of the velocity field. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 3. 1. 2 Blowing and suction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52435788366097,"sku":"NLS9783642090622","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783642090622.jpg?v=1759185343"},{"product_id":"multiphase-flow-dynamics-5-book-nikolay-ivanov-kolev-9783319374499","title":"Multiphase Flow Dynamics 5","description":"Heat Release in the Reactor Core.- Temperature Inside the Fuel Elements.- The Simple Steady Boiling Flow in A Pipe.- The Simple Steady Three-Fluid Boiling Flow in A Pipe.- Core Thermal Hydraulics.- Flow Boiling and Condensation Stability Analysis.- Critical Multiphase Flow.- Steam Generators.- Moisture Separation.- Pipe Networks.- Some Auxiliary Systems.- 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thermal power density in the fuel, structures and moderator, the influence of the thermal power density on the coolant temperature, the spatial distribution of the thermal power density.","brand":"WoB","offers":[{"title":"- \/ - \/ INTERNAL","offer_id":52477063889169,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true},{"title":"GB \/ NEW \/ INGRAM","offer_id":52477065003281,"sku":"NLS9783642100932","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783642100932.jpg?v=1759845034"},{"product_id":"multiphase-flow-dynamics-2-book-nikolay-ivanov-kolev-9783642205972","title":"Multiphase Flow Dynamics 2","description":"Volume 2 is devoted to the important constitutive relations for mathematical description of the mechanical and thermal interactions. 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