Veja grátis o arquivo Mecanica De Fluidos Frank White 5ed enviado para a disciplina de Mecânica dos Fluidos Categoria: Exercícios - Veja grátis o arquivo Mecanica dos Fluidos - Frank White (SOLUCIONARIO) 7 ED enviado para a disciplina de Fenomenos de Transporte Categoria. Baixe grátis o arquivo caite.info enviado por ricardo no curso de Física na ABO. Sobre: Mecanica dos fluidos.
|Language:||English, Spanish, French|
|ePub File Size:||30.85 MB|
|PDF File Size:||17.10 MB|
|Distribution:||Free* [*Regsitration Required]|
Conceitos de Mecânica dos Fluidos by jpereira_ in Types > School Work. Download as PDF or read online from Scribd. Flag for inappropriate content. chapter potential flow and computational fluid dynamics prove that the streamlines in polar coordinates, from eq. (), are orthogonal to the potential lines. SOLUTION MANUAL FOR caite.info caite.info LIBROS UNIVERISTARIOS Y SOLUCIONARIOS DE MUCHOS DE ESTOS.
Therefore, is sand a fluid? Pullen pdf. Il coraggio di essere se stessi pdf - Charmel Roses. Eisele,Sulzer Innotec,Inc. Each program provides detailed comments and on-line help. But they are not true fluids, because they can support a small shear stress without flowing. Il Cinquecento:
Estimate the energy in ft-lbfrequired to compress this air isothermally from one atmosphere Integrate the work of compression, assuming an ideal gas: For the givennumerical data, we obtain the quantitative work done: First evaluate the density change of water. Now the work done, as in Prob. The least-squares parabola which fits the data of Table A-1 is: The data and the parabolic curve-fit are shown plotted on the next page.
What might the difference between these two values represent Chap.
Find a handbook. Then, assuming the data are nearly isentropic, use these values toestimate the speed of sound of mercury at 1 atm and compare with Table 9. We select: The speed of sound is found by differentiating Eq. Calculate and compare, for an ideal gas Table A. Discuss your results. EES real steam: Why do argon and helium have such high values? Why does NH3 have such a low value? What is the lowest k for any gas that you know? But NH3 has four atoms and therefore more than 5 degrees of freedom, hence k willbe less than 1.
The lowest k known to this writer is for uranium hexafluoride, UF6, which is a verycomplex, heavy molecule with many degrees of freedom. What are the dimensionsof B? The density units cancel in the definition of B and thus its dimensions are thesame as pressure or stress: The shear stress isfound from Eq. Then the Reynolds number is defined byEq. Critical values for air from Ref. From Fig. This is an alternative formula to the log-quadratic law of Eq.
The result is: Thus the result is: A is dimensionless, but B,C,D are not. It would bemore comfortable to this writer to write the formula in terms of some referencetemperature To: A-1 of the Appendix.
The film contact areais A and its thickness h. Assuming a linearvelocity distribution in the film, derive ananalytic expression for the terminal velocityV of the block.
Assume a linear viscous velocity distribution in thefilm below the block. Then a force balance in the x direction gives: We simply substitute thesevalues into the analytical formula derived in Prob. Estimate the force required to pull the shaft.
Assuming a linear velocity distribution in the clearance, the force is balancedby resisting shear stress in the oil: Then we substitute the given numerical values to obtain the force: The contact area is A. Determine a theforce required, and b is there a necessary relation between the two viscosity values?
Consider a concentric shaft, as in Prob. Let the inner and outer cylinders haveradii ri and ro, respectively, with total sleeve length L. Put all this together: If the time to fall 50 cm is 32 s, estimate the oil viscosity and verify that the inequality is valid. We need the net weight of the sphere in the fluid: What is the fluidviscosity?
If the experimental uncertainties are: Then theanalytical expression derived in Prob. For estimating overall uncertainty, since the formula involvesfive things, the total uncertainty is a combination of errors, each expressed as a fraction: The overall uncertainty is then expressed as an rms computation [Refs. Neglect air drag. What power P inwatts is required if the belt moves at 2. The power is the viscous resisting force times the belt velocity: Assuming alinear velocity profile and neglecting shearon the outer disk edges, derive an expres-sion for the viscous torque on the disk.
Then, hM 0. The overall uncertainty estimate [see Eq. What is the fluid viscosity? We derived a suitable linear-velocity-profile formula in Prob. What is wrong with the last two data points? Apply our formula, with consistent units, to the first data point: The last two estimates, though measured properly, are incorrect. The Reynolds number of thecapillary has risen above and the flow is turbulent, which requires a different formula.
Neglect the effect of any air in the tube.
The geometry is similar to Prob. Atterminal velocity, the cylinder weight should equal the viscous drag: If the outer cylinder is fixed and the innercylinder moves steadily at axial velocity U, the fluid will move at the axial velocity: Sketch this velocity distributionbetween the cylinders and comment.
Find expressions for the shear stresses at both theinner and outer cylinder surfaces and explain why they are different. Evaluate the shear stress at each cylinder by the Newtonian law, Eq. The velocity profile is seen to be nearly linear. Also c how far will the puck have travelled for case a? Let x be in the direction of travel. Then the only force acting in the First evaluate the time-constant K: But the air-hockey puck does accelerate slowly!
What is the excess pressure within the bubble? For a droplet orbubble with one spherical surface, from Eq. The surface tension forcesYdL1 and YdL2 have a slight verticalcomponent. Thus summation of forces inthe vertical gives the result Fig.
The pressureinside the jet is approximately Pa greater than the air pressure. Estimate the jetdiameter, in mm. Fora liquid cylinder, the internal excess pressure from Eq. Calculate the true fluid height inthe tube and the percent error due tocapillarity if the fluid is a water; and b mercury. This is a somewhat more realistic variation of Ex. What isthe lift force required? Is this a good method? Suggest a ring material.
In the literature this ring-pull device is called a DuNouy Tensiometer.
Theforces are very small and may be measured by a calibrated soft-spring balance. Platinum-iridium is recommended for the ring, being noncorrosive and highly wettingto most liquids.
For further details, see, e. Daniels et al. Derive an expression for thecapillary rise h in the annular gap, if the gap is very narrow. Find an Fig. This is a two-dimensional surface-tension problem, with single curvature. Thesurface tension rise is balanced by the weight of the film. The constant C2 is foundfrom the maximum height at the wall: Calculate the maxi-mum diameter needle able to float on the Fig.
If these tensions are nearly vertical, a vertical force balance gives: The formula becomes: With b the width of the platesinto the paper, the capillary forces on each Fig. For an isothermal process, expressD3 as a function of D1, D2, patm, and surface tension Y. The masses remain the same for an isothermal process of an ideal gas: This is a cubic polynomial with a known right hand side, to be solved for D3. At whatvelocity will cavitation bubbles form? The basic outline of eleven chapters and five appendices remains the same.
The triad of integral, differential, and experimental approaches is retained and is approached in that order of presentation. The book is intended for an undergraduate course in fluid mechanics, and there is plenty of material for a full year of instruction. The author covers the first six chapters and part of Chapter7 in the introductory semester. The more specialized and applied topics from Chapters 7 to 1 are then covered at our university in a second semester.
The informal, student-oriented style is retained and, if it succeeds, has the flavor of an interactive lecture by the author. Approximately 30 percent of the problem exercises, and some fully worked examples, have been changed or are new. The total number of problem exercises has increased to more than in this fourth edition. The focus of the new problems is on practical and realistic fluids engineering experiences.
Problems are grouped according to topic, and some are labeled either with an asterisk especially challenging or a computer-disk icon where computer solution is recommended. Anumber of new photographs and figures have been added, especially to illustrate new design applications and new instruments. He had the great idea of setting comprehensive problems at the end of each chapter, covering a broad range of concepts, often from several different chapters. These comprehensive problems grow and recur throughout the book as new concepts arise.
Six more open-ended design projects have been added, making 15 projects in all.
The projects allow the student to set sizes and parameters and achieve good design with more than one approach. An entirely new addition is a set of 95 multiple-choice problems suitable for preparing for the Fundamentals of Engineering FE Examination. These FE problems come at the end of Chapters 1 to Meant as a realistic practice for the actual FE Exam, they are engineering problems with five suggested answers, all of them plausible, but only one of them correct.
New to this book, and to any fluid mechanics textbook, is a special appendix, AppendixE, Introduction to the Engineering Equation Solver EES , which is keyed to many examples and problems throughout the book. The author finds EES to be an extremely attractive tool for applied engineering problems.
Not only does it solve arbitrarily complex systems of equations, written in any order or form, but also it has builtin property evaluations density, viscosity, enthalpy, entropy, etc. The book is now available with or without an EES problems disk.
The EES engine is available to adopters of the text with the problems disk. Another welcome addition, especially for students, is Answers to Selected Problems.
Over answers are provided, or about 43 percent of all the regular problem assignments. Thus a compromise is struck between sometimes having a specific numerical goal and sometimes directly applying yourself and hoping for the best result.
There are revisions in every chapter. Chapter 1—which is purely introductory and could be assigned as reading—has been toned down from earlier editions. For example, the discussion of the fluid acceleration vector has been moved entirely to Chapter4.
Four brief new sections have been added: Chapter 2 has an improved discussion of the stability of floating bodies, with a fully derived formula for computing the metacentric height. Coverage is confined to static fluids and rigid-body motions.
An improved section on pressure measurement discusses modern microsensors, such as the fused-quartz bourdon tube, micromachined silicon capacitive and piezoelectric sensors, and tiny 2mm long silicon resonant-frequency devices. Although some texts begin with an entire chapter on the Bernoulli equation, this author tries to stress that it is a dangerously restricted relation which is often misused by both students and graduate engineers.
In Chapter 4 a few inviscid and viscous flow examples have been added to the basic partial differential equations of fluid mechanics. More extensive discussion continues in Chapter8.
Chapter 5 is more successful when one selects scaling variables before using the pi theorem. Nevertheless, students still complain that the problems are too ambiguous and lead to too many different parameter groups. Several problem assignments now contain a few hints about selecting the repeating variables to arrive at traditional pi groups. Meanwhile, the three basic pipe-flow problems—pressure drop, flow rate, and pipe sizing—can easily be handled by the EES software, and examples are given.
Some newer flowmeter descriptions have been added for further enrichment. Chapter 7 has added some new data on drag and resistance of various bodies, notably biological systems which adapt to the flow of wind and water. Chapter 8 picks up from the sample plane potential flows of Section 4.