Top Research Papers on Fluid Mechanics

This document lists the following equipment purchases using DOD-University Research Instrumentation funds: equipment purchases, work stations, and Speciality Equipment for Work Stations.

The findings of a difference in tracer velocities heralds the introduction into fluid mechanics of a general bipartite theory of fluid mechanics, bivelocity hydrodynamicics, differing from conventional hydrodynamics in situations entailing compressible flows and reducing to conventional hydRodynamics when the flow is incompressible, while being applicable to both liquids and gases.

Turbulence in a fluid has two mutually contradictory aspects, that is, the apparent ran-domeness as a whole and the intrinsic determinicity due to the fluid-dynamical equations. In the traditional approarch to this subject, the velocity field of turbulence has been represented by the mean products of the turbulent velocities at several points and a time, and the equations governing the dynamical system composed of the mean velocity products are solved to obtain the mean velocity products as the deterministic functions in time. The works along this approach constitute the main body of turbulenc...

This invention provides a fluid mechanism that can arrange a plurality of fluid device units and external fluid devices mounted as a set on the fluid device units effectively and compactly. Each of the fluid device units is arranged with respective side surfaces in a longitudinal direction of the fluid device unit tightly attached, and the external fluid devices are arranged side-by-side external to and outside of the fluid device unit in the width direction. Furthermore, as for an introducing path and a discharging path that connect the external fluid devices and the fluid device unit, the in...

The author discusses some basic questions in fluid dynamics. He describes Newton's contribution to fluid dynamics in the second volume of the Principia. He presents a brief review of fluid dynamics since Newton, and discusses the nature and content of physics curricula in schools and universities. He also outlines some aspects of modern research.

Abstract The paper review key results [1-14] of the joint researches conducted by IMech and IUSTI. In the First part, we review models and experimental results on the linear and nonlinear instability of a capillary jet including both axisymmetric and nonaxisymmetric disturbances. In the Second part, results on draw resonances, occurring during a glass fibre process are reviewed, as well as the unique optical models and methods developed to perform these studies.

Orographic wakes have important effects in the atmosphere and oceans as a source of waves and vortices. The induced drag forces influence the atmospheric winds and oceanic currents, Some of the largest and most persistent circulation errors in global numerical weather prediction and climate models are still attributable to the inadequate representation of this topographic drag. In oceanic canyons, wake effects lead to vertical mixing and upwelling. Orographic effects are also expected to play an important role at the outer boundary of planetary liquid cores, with influence on the magnetic fiel...

Contents Preface to the eighth edition 1 Fundamental Concepts Problems 2 Fluid Statics Problems 3 The Principles Governing Fluids in Motion Problems 4 The Momentum Equation 5. Physical Similarity and Dimensional Analysis Problems 6 Laminar Flow between Solid Boundaries Problems 7 Flow and Losses in Pipes and Fittings Problems 8 Boundary Layers, Wakes and other Shear Layers Problems 9 The flow of an Inviscid Fluid Problems 10 Flow with a Free Surface Problems 11 Compressible Flow of Gases Problems 12 Unsteady Flow Problems 13 Fluid Machines Problems Appendix 1 Units and Conversion Factors Appen...

The contents of this book are: Characteristic scales and nondimensional parameters; Basic equations; Statistical tools for description of turbulence; Examples of homogeneous turbulent flows; Waves; Instability and transition to turbulence; Shear flow turbulence structure; Turbulence modeling and closure schemes; Aerodynamic noise; and Convective transport. The emphasis is on ''the dynamics of processes that participate in creating and maintaining turbulent flows and topics covered include stability, wave motions and coherent structures.

Starting with a review of vector fields and their integral curves, the book presents the basic equations of the subject: Euler and Navier–Stokes. Some solutions are studied next: ideal flows using conformal transformations, viscous flows such as Couette and Stokes flow around a sphere, shocks in the Burgers equation. Prandtl’s boundary layer theory and the Blasius solution are presented. Rayleigh–Taylor instability is studied in analogy with the inverted pendulum, with a digression on Kapitza’s stabilization. The possibility of transients in a linearly stable system with a non-normal operator ...

The numerically accessible parameter regime is investigated and simulations incorporating thermal variations at the outer spherical boundary are used to investigate the paleomagnetic signature of core-mantle coupling and the effects of this coupling on convection and magnetic field generation.

Flood mechanics is presented so that students gain an understanding of and an ability to analyze the important phenomena encountered by practicing engineers, and the authors succeed in this through the use of several pedagogical tools.

Providing a modern approach to classical fluid mechanics, this textbook presents an accessible and rigorous introduction to the field, with a strong emphasis on both mathematical exposition and physical problems. It includes a consistent treatment of a broad range of fluid mechanics topics, including governing equations, vorticity, potential flow, compressible flow, viscous flow, instability, and turbulence. It has enhanced coverage of geometry, coordinate transformations, kinematics, thermodynamics, heat transfer, and nonlinear dynamics. To round out student understanding, a robust emphasis o...

Part 1 Basic principles of fluid mechanics: fundamental notions stress at point fluid statics foundations of flow analysis basic laws for finite sysems and finite control continuity and momentum basic laws for finite systems and finite control thermodynamcis differenial forms of the basic laws dimensional analysis and similitude. Part 2 Analysis of important internal flows: incompressible viscous flow through pipes general incompressible viscous flow - the Navier-Stokes equations one-dimensional compressible flow potential flow boundary-layer theory free-surface flow turbomachinery computation...

This report, presents an overview of the research and development activities of the Fluid Mechanics division during 1986. The division is mainly concerned with Investigations of complex flow fields associated with aerospace vehicles. The repamp; highlights progress in several areas of computational and experimental' fluid mechanics, including vortex dominated flows, flow visualisation, airfoil design codes, and Laser based flow measurements. Some of the work was sponsored by external agencies like ARDB and NSTL.

of Scientific Presentations

Fluid Mechanics and fluid power enginerring , Fluid Mechanics and fluid power enginerring , کتابخانه دیجیتالی دانشگاه علوم پزشکی و خدمات درمانی شهید بهشتی

According to recent research from Malaysia, Both hydro-dynamically and thermally fully developed laminar heat transfer of non-Newtonian fluids between fixed parallel plates has been analyzed taking into account the effect of viscous dissipation of the flowing fluid.

This book, originally published in Moscow in 1965, is of interest to a wide scientific and technical audience, including geophysicists, meteorologists, aerodynamicists, chemical, mechanical, and civil engineers--in short, all interested in the fundamental problems of flow, mass, and heat transfer. The authors deal with the theory of hydrodynamic instability and the development of turbulence, the application of dimensional analysis, and the theory of similarity to turbulent flow in pipes, ducts, and boundary layers, as well as free turbulence. They discuss semiempirical theories of turbulence, ...

The year 2019 marked the bicentenary of George Gabriel Stokes, who in 1851 described the drag—Stokes drag—on a body moving immersed in a fluid, and 2020 is the centenary of Christopher Robin Milne, for whom the game of poohsticks was invented, so this is an apt moment to review the state of the art of the fluid mechanics.

Extreme sports such as canyoneering have expanded greatly since the turn of the century yet little scientific attention has been paid to the analyses of the dangers of those activities. The author was much involved in promoting one such sport, namely canyoneering, and presents this paper as an example of the kind of fluids engineering analyses that are needed in order to objectively quantify those dangers and properly advise the participants. In canyoneering, the primary fluid-related sources of danger are the impact of falling water on the human body and the dangers a swimmer faces in a plung...

We consider conserved currents in an interacting network of one-dimensional objects (or strings). Singular currents localized on a single string are considered in general, and a formal procedure for coarse-graining over many strings is developed. This procedure is applied to strings described by the Nambu-Goto action such as cosmic strings. In addition to conserved currents corresponding to the energy-momentum tensor, we obtain conserved currents corresponding to an antisymmetric tensor hF µ� i = hx ′µ u x � − u x µ x ′� i, where u x µ and x ′µ are the velocity and tangent vectors of strings. ...

The topic of fluid mechanics is common to several disciplines: mechanical engineering, aerospace engineering, chemical engineering, and civil engineering. In fact, it is also related to disciplines like industrial engineering, and electrical engineering. While the emphasis is somewhat different in this book, the common material is presented and hopefully can be used by all. One can only admire the wonderful advances done by the previous geniuses who work in this field. In this book it is hoped to insert, what and when a certain model is suitable than other models. One of the difference in this...

1. Kinematics 2. Dynamics 3. Interfacial phenomena 4. Similarity and Scaling 5. Boundary layers 6. Turbulence 7. Control Volumes 8. History.

The ‘UCOM’ project investigates ultrasound cavitation and shock-tissue interaction, which aims at closing the gap between medical science and compressible fluid mechanics for fluid-mechanical destruction of cancer tissue.

A numerical heart and circulation model to simulate haemodynamics for rate-responsive pacing evaluation of haemodialysis using computer simulation folding motifs, kinetics and functions in the proximal convoluted tubule coupled behaviour of lung respiration.

When anticommuting Grassmann variables are introduced into a fluid dynamical model with irrotational velocity and no vorticity, the velocity acquires a nonvanishing curl and the resultant vorticity is described by Gaussian potentials formed from the Grassmann variables. Upon adding a further specific interaction with the Grassmann degrees of freedom, the model becomes supersymmetric.

 The statistical mechanics of the interfacial region is studied using the Monte Carlo and molecular dynamics simulation techniques. The penetrable-sphere model of the liquid/vapour interface is simulated using the Monte Carlo method. The pressure equation of state is calculated in the one-phase region and compared to analytic virial expansions of the system. Density profiles of the gas/liquid surface in the two-phase region are calculated and are compared to profiles solved in the mean-field approximation. The effect of the profile near a hard wall is investigated and as a consequence the the...

This book represents a Proceedings from the First Asian Congress of Fluid Mechanics, which was held at the Indian Institute of Science (IISc) in December of 1980. The 16 papers comprising the volume are extended versions of the invited lectures from the Congress. The objectives of the book (and those of the Congress) are to present advances in major areas of fluid mechanics and to highlight fluid mechanics technology in the Asian regions. Both objectives are achieved with this publication. The mix of subjects is well balanced and covers most major topics in fluid mechanics research.

Throughout the duodenum (the first 30 em or so of the small intestine), the smooth muscle lies in two layers: the longitudinal and the circular layers seem to be able to contract independently.

Preface Notation 1. Basic concepts 2. Towards a constitutive law for fluid materials 3. Vorticity laws 4. Fundamental concepts of turbulence 5. Dynamical systems and chaotic advection 6. Chaos and the onset of turbulence 7. Boundary layer theory 8. Wave propagation 9. Fundamentals of classical thermodynamics Appendices Index.

The method of Lagrangians with covariant derivative (MLCD) is applied to a special type of Lagrangian density depending on scalar and vector fields as well as on their first covariant derivatives. The corresponding Euler-Lagrange's equations and energy-momentum tensors are found on the basis of the covariant Noether's identities.

Fundamentals. Fluid Statics. Kinematics of Fluid Motion. Systems, Control Volumes, Conservation of Mass, and The Reynolds Transport Theorem. Flow of an Incompressible Ideal Fluid. The Impulse--Momentum Principle. Flow of a Real Fluid. Similitude, Dimensional Analysis and Normalization of Equations of Motion. Flow in Pipes. Flow in Open Channels. Lift and Drag--Incompressible Flow. Introduction to Fluid Machinery. Flow of Compressible Fluids. Fluid Measurements. Appendices. Index.

The present invention relates to a fluid machine housing, in particular made of a two-part housing piston machine. The housing having a closed web of the main housing. In this connection plate via a plurality of bolts screwed to the main housing via two centering pins and with little positioning tolerances relative to the main housing. In contrast centering pin piston machine axial centerline of the drive shaft are arranged two-fold rotational symmetry. And bolt position have not rotational symmetry about the centerline axis. Thereby preventing erroneous assembly of webs.

A while maintaining continuous fluid flow to prevent bacterial development through mechanism, conveying the sterile fluid efficiently to a number of remote departments. In A fluid delivery mechanism, comprising a reservoir tank for supplying the first pipe structural loop that includes a first pump which urges the return to be allowed and the tank through the first loop fluid under a first pressure and cage, and also is supplied from the tank, and at least one pipe structure branch having a second pump by a fluid urge to pass through the branch at a second pressure downstream of the second pum...

1. Introduction and Basic Definitions. 2. Conservation Laws for Closed Systems. 3. Conservation Laws for Open Systems. 4. Differential View of Fluid Motion: Fluid Kinematics. 5. Differential Form of the Conservation Laws. 6. Dimensional Analysis of Fluid Systems. 7. Exact Analytic Solutions. 8. Combined Analytic and Experimental Solutions. 9. Ideal Inviscid Flow. 10. Dynamics of Rotating Fluids: Turbomachinery. 11. Compressible Flow. 12. Experimental Fluid Mechanics. 13. Computational Fluid Mechanics. Appendix A. Fluid Properties. Appendix B. Compressible Flow Tables. Appendix C. Differential ...

Intense fluid motions can be generated by the solidification of a binary liquid. This review paper describes systematically some of the concepts involved in the fluid mechanics of solidification. It also presents quantitative calculations for the fluid motion, the rate of growth of solid and the evolution of both the thermal and the compositional fields in various geometries. The results of many of the calculations are favourably compared with data from laboratory experiments using aqueous solutions.

1. Properties of Fluids 2. Fluid Statics 3. Hydrostatic Force on Surfaces 4. Bouyancy and Flotation 5. Translation and Rotation of Liquid Masses 6. Dimensional Analysis and Hydraulic Similitude 7. Fundamentals of Fluid Flow 8. Flow in Closed Conduits 9. Complex Pipeline Systems 10. Flow in Open Channels 11. Flow of Compressible Fluids 12. Measurement of Flow of Fluids 13. Forces Developed by Moving Fluids 14. Fluid Machinery

(NOTE: Most chapters begins with The Big Picture and Objectives and concludes with References, Internet Sites, Practice Problems, and Computer Programming Assignments sections.) 1. The Nature of Fluids and the Study of Fluid Mechanics. Basic Introductory Concepts. The International System of Units (SI) The U.S. Customary System. Weight and Mass. Temperature. Consistent Units in an Equation. The Definition of Pressure. Compressibility. Density, Specific Weight, and Specific Gravity. Surface Tension. 2. Viscosity of Fluids. Dynamic Viscosity. Kinematic Viscosity. Newtonian Fluids and Nonnewtonia...

A seemingly simple fire can grow rapidly into an inescapable furious inferno, resulting in a catastr…

Part I. Preparing to Study Flow: 1. Why study fluid mechanics? 2. How fluids behave Part II. The Physics of Flow: 3. Modeling fluids 4. Molecular fluid stresses 5. Stress-velocity relationships Part III. Flow Field Calculations: 6. Microscopic balance equations 7. Internal flows 8. External flows Part IV. Advanced Flow Calculations: 9. Macroscopic balance equations 10. How fluids behave (redux) Part V. Appendices: A. Glossary B. Mathematics appendix C. Supplemental mathematics appendix D. Special topics.

On montre comment les concepts de fractals fournissent de nouvelles voies pour le traitement des donnees de turbulence

Contents 1. Fundamental Concepts 1.1 Introduction 1.2 Gases. Liquids and Solids 1.3 Methods of Description 1.4 Dimensions and Unit Sytems 1.5 Problem Solving 2. Fluid Properties 2.1 Introduction 2.2 Mass, Weight and Density 2.3 Pressure 2.4 Temperature and Other Thermal Properties 2.5 The Perfect Gas Law 2.6 Bulk Compressibility Modules 2.7 Viscosity 2.8 Surface Tension 2.9 Fluid Energy 3. Case Studies in Fluid Mechanics 3.1 Introduction 3.2 Common Dimensionless Groups 3.3 Case Studies 4. Fluid Forces 4.1 Introduction 4.2 Classification of Fluid Forces 4.3 The Orgins of Body and Surface Forces...

A model is proposed to explain the means by which an edgetone transforms the energy of a fully developed plane jet into energy which is radiated as sound. The edgetone configuration considered consists of a flat plate located in the medial plane of a fully developed two‐dimensional jet. The flow is modeled as follows. A periodic disturbance at the jet origin leads to the formation of an asymmetric vortex street which propagates downstream with a fixed convection velocity and wavelength. The vortex strength, convection velocity, and wavelength are determined as functions of the Strouhal number ...

A fluid is a substance in which the constituent molecules are free to move relative to each other, and in a solid, the relative positions of molecules remain essentially fixed under non-destructive conditions of temperature and pressure.

The experimental flow analysis is based on conventional and up-to-date measuring techniques. Twoor three-dimensional density distributions are determined using Mach-Zehnder interferometry or holographic interferometry. Classical optical methods like the shadow, schlieren, and color schlieren technique are used to visualize flow phenomena such as shock waves, shock boundary-layer interactions, and separations. Various specifications of the particle-image velocimetry (PIV) method are applied to measure velocity distributions of internal and external flow problems. For example, using holographic ...

Systems and Units of Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Statics of Rigid Bodies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Center of Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Moment of Inertia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Kinematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Dynamics of Particles . . . . . . . . . . . . ....

This chapter covers the basics on many of the fluid classifications. Some common fluid classifications are viscous or inviscid, compressible or incompressible, laminar or turbulent, Newtonian or non-Newtonian, and steady or unsteady. The chapter presents the properties of fluids generally encountered in engineering practice. Included are the commonly used properties of density, specific gravity, bulk modulus (compressibility), viscosity, surface tension, and vapor pressure. Based on the radial variation of the strength of the rotation, two major types of vortices are assumed: forced vortex and...

Nunn provides an overview of the topic of fluid mechanics, a subject often considered essential in college engineering programs.

A numerical method for highly accelerated laminar boundary-layer flows.- Relaxation methods for transonic flow about wing-cylinder combinations and lifting swept wings.- Calcul D'un Ecoulement Viscoelastique Dans une Cavite Carree.- Oscillations Libres d'un Bassin en Rotation.- Numerical approach for investigating some transsonic flows.- The computation of three-dimensional viscous internal flows.- Inviscid reattachment of a separated shear layer.- Time dependent calculations for transonic flow.- Two calculation procedures for steady, three-dimensional flows with recirculation.- Numerical solu...