Flow equations

This chapter introduces issues concerning unsteady flow, i.e. flow situations in which hydraulic conditions change with time. Many flow phenomena of great importance to the engineer are unsteady in character, and cannot be reduced to steady flow by changing the viewpoint of the observer. The equations of motion are formulated and the method of characteristics is introduced as main part of this chapter. The concept of positive and negative waves and formation of surges are described. Finally, some solutions to unsteady flow equations are introduced in their mathematical concepts.......
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This work gives a survey of the results obtained in a series of papers by Boukrouche & Lukaszewicz (2004, 2005a,b, 2007) and Boukrouche, Lukaszewicz, & Real (2006) in which we consider the problem of the existence and finite dimensionality of attractors for some classes of twodimensional turbulent boundarydriven flows (Problems I–IV below). The flows admit mixed, nonstandard boundary conditions and also timedependent driving forces (Problems III and IV).
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TẠP CHÍ PHÁT TRIỂN KH&CN, TẬP 9,Số 42006 Vu Tu Hoai(1), Nguyen Thanh Nam(2) (1) J.V. “Vietsovpetro” (2) University of Technology, VNUHCM (Manuscript Received on December 12 th, 2005, Manuscript Revised March 27 th, 2006) ABSTRACT: Calculation of pressure drop along gas pipelines is an important activity in order to ensure safety and effectiveness in petroleum gas transportation. We can’t control the transportation process unless we understand that technology.
11p phalinh19 19082011 30 2 Download

Tham khảo sách 'introduction to practical fluid flow is dedicated', kỹ thuật  công nghệ, cơ khí  chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả
208p khangoc2392 12082012 17 2 Download

(BQ) Part 1 book "Fundamentals of compressible flow with aircraft and rocket propulsion" has contents: Definitions and basic relations, the energy equation, rate equations for a control volume, is entropic flow with variable area wave motion, flow with normal shock waves, flow with oblique shock waves, flow in constant area ducts with friction.
158p bautroibinhyen18 21022017 6 2 Download

Upon completion of this chapter you should understand: Basic concepts associated with the Income Statement, basic concepts associated with the Balance Sheet, cash flow and cash flow statements, financial statement generation and the accounting equation, other types of financial statements.
18p youcanletgo_05 22012016 8 1 Download

After studying this chapter you will be able to: Accounting equation entries applied to capital costs and expenses and their impact on financial statements; depreciation methods, calculating depreciation and book value of assets and the affect on profit, taxes and cash flow; inventory management and the affect on the accounting equation; financial statement ratios and their use for economic decision making.
26p youcanletgo_05 22012016 4 1 Download

(BQ) Part 2 book "Computational fluid dynamics for engineers" has contents: Inviscid flow equations for incompressible flows, boundary layer equations, stability and transition, grid generation, inviscid compressible flow, incompressible navier stokes equations, compressible navier—stokes equations.
212p bautroibinhyen18 23022017 10 1 Download

This paper proposes a 2Dquasi model for simulations of the lateral distribution of flow velocity and of unit water discharge in openchannel sections. The latters are obtained by solving the governing equation, which is derived from the Reynolds equations and allows for taking into account the gravity, bed shear stress, and turbulent diffusion force in calculations. Using the experimental data, a sensitivity analysis of modeling parameters, e.g. Manning coefficient and eddy viscosity was performed firstly.
8p thihuynh3006 16032018 1 0 Download

The textbook of Open Channel Hydraulics for Engineers, also called Applied Hydraulics, emphasizes the dynamics of the openchannel flow, by attempting to provide a complete framework of the basic equations of motion of the fluid, which are used as building blocks for the treatment of many practical problems. The structure of the document, with seven chapters totally, follows a logical sequence from a description and classification of Fluid Mechanics and Open Channel Flows, as reviewed in Chapter 1. A development of the basic equation of motion for uniform flow is encountered in Chapter 2.
129p ktct_1669 10042012 138 46 Download

By the end of this chapter, you should be able to: Explain and use basic financial terms and concepts. Define the key financial statements and accounting equations and explain their purposes and contents. Describe the different forms of business structure and recognize similarities and differences among them. Change is a given in business today, and managers are expected to do more and understand more than they ever had to in the past. How often have you heard statements just like these—often from your own managers?...
203p haiduong_1 03042013 46 18 Download

Over the past three decades, information in the aerospace and mechanical engineering fields in general and turbomachinery in particular has grown at an exponential rate. Fluid Dynamics and Heat Transfer of Turbomachinery is the first book, in one complete volume, to bring together the modern approaches and advances in the field, providing the most uptodate, unified treatment available on basic principles, physical aspects of the aerothermal field, analysis, performance, theory, and computation of turbomachinery flow and heat transfer....
838p trua_nang 22042013 36 18 Download

The history of Computational Fluid Dynamics, or CFD for short,, started in the early 1970’s. Around that time, it became an acronym for a combination of physics, numerical mathematics, and, to some extent, computer sciences employed to simulate fluid flows. The beginning of CFD was triggered by the availability of increasingly more powerful mainframes and the advances in CFD are still tightly coupled to the evolution of computer technology.
470p nhatkyvodanh 11082012 41 17 Download

bridge University, Cambridge, 1967; Bird, Stewart, and Lightfoot, Transport Phenomena, 2d ed., Wiley, New York, 2002; Brodkey, The Phenomena of Fluid Motions, AddisonWesley, Reading, Mass., 1967; Denn, Process Fluid Mechanics, PrenticeHall, Englewood Cliffs, N.J., 1980; Landau and Lifshitz, Fluid Mechanics, 2d ed., Pergamon, 1987; Govier and Aziz, The Flow of Complex Mixtures in Pipes, Van Nostrand Reinhold, New York, 1972, Krieger, Huntington, N.Y., 1977; Panton, Incompressible Flow, Wiley, New York, 1984; Schlichting, Boundary Layer Theory, 8th ed.
59p beobobeo 01082012 51 15 Download

Average depth model has a variety of applications in hydraulic engineering, especially in applications that flow depth is much smaller than the width of the flow. In this method the vertical variation is negligible and the hydraulic variables average integrated from channel bed to the surface free for the vertical axis. in equations arising management, pure hydrostatic pressure is assumed that not really valid in the case of flow in the bed is curved and can not be described curvature effects of the bed.
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A diode is a semiconductor device which allows current to flow through it in only one direction. Although a transistor is also a semiconductor device, it does not operate the way a diode does. A diode is specifically made to allow current to flow through it in only one direction.
55p tuyenoto 10052010 62 10 Download

Starting from a derivation of the conservation equations for multicomponent multiphase flows in porous media and a discussion of convective vs. diffusive/dispersive transport, the reader is introduced to a mathematical framework, based on the method of characteristics, for solving convectiondominated transport problems.
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Chapter 1 is for readers who have less background in partial differential equations (PDEs). It contains materials which will be useful in understanding some of the jargon related to the rest of the chapters in this book. A discussion about the classification of the PDEs is presented. Here, we outline the major analytical methods. Later in the chapter, we introduce the most important numerical techniques, namely the finite difference method and finite element method. In the last section we briefly introduce the level set method.
446p chuyenphimbuon 21072012 19 9 Download

There is an everincreasing need to understand turbulent and multiphase combus tion due to their broad application in energy, environment, propulsion, transporta tion, industrial safety, and nanotechnology. More engineers and scientists with skills in these areas are needed to solve many multifaceted problems. Turbulence itself is one of the most complex problems the scientific community faces. Its complexity increases with chemical reactions and even more in the presence of multiphase flows.
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Energy is defined as the capacity of a substance to do work. It is a property of the substance and it can be transferred by interaction of a system and its surroundings. The student would have encountered these interactions during the study of Thermodynamics. However, Thermodynamics deals with the end states of the processes and provides no information on the physical mechanisms that caused the process to take place. Heat Transfer is an example of such a process. A convenient definition of heat transfer is energy in transition due to temperature differences.
156p tuanloc_do 04122012 41 8 Download