thermodynamics fluid mechanics definitions of efficiency

... thesis is to study thermodynamics and mechanics of molecular motors The methods of cycle kinetics and mechanical modeling are applied to analyze thermodynamics and working mechanisms of molecular motors ... Motor’s efficiency and the least energy price for microscopic direction 30 3.3 Experimental phenomenology of kinesin-1 and F1-ATPase reveals 31 a best efficiency 3.4 Thermodynamics of molecular ... 45 4.1 Introduction ……… ……… 45 4.2 Generalized efficiency and efficiency-velocity trade-off ………… 46 4.2.1 Definition of generalized efficiency ……… 46 4.2.2 The basic kinetic diagram

Ngày tải lên: 10/09/2015, 09:27

... Trang 2R.S JohnsonFluid Mechanics and the Theory of Flight Trang 3Download free eBooks at bookboon.comFluid Mechanics and the Theory of Flight © 2012 R.S Johnson & Ventus ... presentation of complex-variable techniques and classical aerofoil theory (here are many routes that could be followed, based on a general introduction to the fundamentals of the theory of luid mechanics ... pipe, of cross-sectional area A, branches into two, one of area nA and the other of area mA he speed of an incompressible luid at area A is u and at area nA it is v; ind the speed in the branch of

Ngày tải lên: 09/03/2016, 10:20

... Fundamentals of Fluid Mechanics 78 Fundamentals of Fluid Mechanics 79 Fundamentals of Fluid Mechanics 80 Fundamentals of Fluid Mechanics 81 Fundamentals of Fluid Mechanics 82 Fundamentals of Fluid Mechanics ... Fundamentals of Fluid Mechanics 84 Fundamentals of Fluid Mechanics 85 Fundamentals of Fluid Mechanics 86 Fundamentals of Fluid Mechanics 87 Fundamentals of Fluid Mechanics 88 Fundamentals of Fluid Mechanics ... Fundamentals of Fluid Mechanics CHAPTER -1 Definition of a fluid:Fluid mechanics deals with the behaviour of fluids at rest and in motion It is logical to begin with a definition of fluid Fluid is

Ngày tải lên: 01/06/2018, 15:01

... legitimacy of thermodynamics and of statistical mechanics in addressing the puzzle of irreversibility It is in-deed difficult to make up one's mind whether some of this work is a work of art or ... understood- of evolutionary biology and the origins of life, and of the received ideas on 1 Trang 102 THE ORIGINS OF CAPITAL thermodynamics became essential The motivation and the mechanics for ... "The Wealth of Nations," The New York Review of Books, 19 July 1984) 6 The seminal work of P.A Samuelson, Foundations of Economic Analysis, (1948), abounds with the mathematics of thermodynamics

Ngày tải lên: 06/01/2020, 09:38

... Trang 1Fluid Mechanics and the Theory of Flight Download free books at Trang 2R.S Johnson Fluid Mechanics and the Theory of Flight Trang 3Fluid Mechanics and the Theory of Flight © 2012 ... on fluid mechanics; this is a quite deliberate choice here Thus the development follows that of a conventional introductory module on fluids, comprising a basic introduction to the main ideas of ... introduce a suitable, general description of a fluid, and then to develop an appropriate (mathematical) representation of it This involves regarding the body of fluid on the large (macroscopic) scale

Ngày tải lên: 21/01/2021, 09:58

... number of moles is constant By what factor will the pressure change if the absolute temperature Trang 18A quantity of ideal gas at 10 C and 100 kPa occupies a o volume of 3.0 m How many moles of ... speeds of 500, 600,700, 800, and 900 m/s The ratio between rms and average speeds is Trang 22Approximate the air around you as a collection of nitrogen molecules, each of which has a diameter of ... another molecule? Trang 23One mole of oxygen (assume it to be an ideal gas) expands at a constant temperature of 310K from an initial volume 12L to a final volume of 19L Trang 24A typical dorm room

Ngày tải lên: 13/02/2025, 16:22

... Trang 1Fluid statics Fluid statics is concerned with the balance of forces which stabilise fluids at rest In the case of a liquid, as the pressure largely changes ... Characteristics of pressure The pressure has the following three characteristics 1 The pressure of a fluid always acts perpendicular to the wall in contact with the fluid 2 The values of the pressure ... the principle of the hydraulic press 3.1.4 Pressure of fluid at rest In general, in a fluid at rest the pressure varies according to the depth Consider a minute column in the fluid as shown

Ngày tải lên: 22/10/2012, 10:59

... narrowing channel 48 Fundamentals of flow Fig 4.9 Deformation of elementary rectangle of fluid Now, assume that, as shown in Fig 4.9, an elementary rectangle of fluid ABCD with sides dx, dy, which ... was the derivation of the momentum equation of viscous fluid for turbulent flow and the theory of oil-film lubrication as oil in a hydraulic machine Similarly, even in the case of a gas, the compressibility ... and spinning of a liquid 47 Osborne Reynolds (1842-1912) Mathematician and physicist of Manchester, England His research covered all the fields of physics and engineering - mechanics, thermodynamics,

Ngày tải lên: 22/10/2012, 10:59

... energy applied to a fluid Consewation of energy 57 Fig 5.2 Movement of roller-coaster Fig 5.3 Conservation of fluid energy A streamline (a line which follows the direction of the fluid velocity) ... mathematical development of Newtonian mechanics, while formulating the equations of motion of a perfect fluid and solid Lost his sight in one eye and then both eyes, as a result of a disease, but still ... Torricelli's theorem Coeficient of contraction Ratio C, of area a, of the smallest section of the discharging flow to area a of the small hole is called the coefficient of contraction, which is approximately

Ngày tải lên: 22/10/2012, 10:59

... 1Flow of viscous fluid All fluids are viscous In the case where the viscous effect is minimal, the flow can be treated as an ideal fluid, otherwise the fluid must be treated as a viscous fluid ... between the velocity, pressure, etc., in the flow of a two-dimensional incompressible viscous fluid Consider the elementary rectangle of fluid of side dx, side dy and thickness b as shown in Fig ... the x Fig 6.1 Flow balance in a fluid element Trang 2The mass of fluid element (pbdxdy) ought to increase by a(pbdxdy/at) in unit time by virtue of this stored fluid Therefore, the following equation

Ngày tải lên: 22/10/2012, 10:59

... flow velocity) Since the velocity of a viscous fluid is zero on the wall, the fluid near the wall is decelerated The range subject to deceleration extends as the fluid flows further downstream, ... / 2 g ) expresses the frictional loss of head (the lost energy of fluid per unit weight) [(u2/2g) expresses the pressure reduction equivalent to the sum of the velocity stored when the velocity ... pipe In the case of a smooth pipe, the following equations have been developed: equation of Blasius: A = 0.3164Re-’I4 (Re = 3 x lo3 - 1 x lo’) equation of Nikuradse: equation of K6rmin-Nikuradse:

Ngày tải lên: 22/10/2012, 10:59

... travelling velocity a of a long wave in a water channel of small depth h is a The ratio of the flow velocity to the wave velocity is called the Froude number The Froude number of a tranquil flow ... 137 Fig 8.2 Open channel velocity D in an open channel of constant section and inclination angle 8 of the bottom face Now examine the balance of forces on water between the two sections a distance ... the direction of the flow is that component of water weight Since the flow is not accelerating this force must equal the frictional force due to the wall If the cross-sectional area of the open

Ngày tải lên: 22/10/2012, 10:59

... cylinder Ideal fluid Let us theoretically study (neglecting the viscosity of fluid) a cylinder placed in a flow The flow around a cylinder placed at right angles to the flow U of an ideal fluid is ... drag of a body 157 Fig 9.11 Flow around a flat plate Now, set the thickness of the boundary layer at a distance x from the leading edge of the flat plate to Consider the mass flow rate of the fluid ... whole body surface of the component in the direction of the flow velocity U of this force p dA, is called form drag or pressure drag The drag D/ is the similar integration of zdA and is called

Ngày tải lên: 22/10/2012, 10:59

... D of a boat is determined by the velocity u of the boat, the density p of fluid and the acceleration of gravity g, derive the relationship between them by dimensional analysis 5 When fluid of ... development of surface tension waves and to a poured liquid Mach number When a fluid flows at high velocity, or when a solid moves at high velocity in a fluid at rest, the compressibility of the fluid ... applied to other fluids such as air or oil, and also used irrespective of the size of the sphere Furthermore, the form of eqn (10.9) is always applicable, not only to the case of the sphere but

Ngày tải lên: 22/10/2012, 10:59

... measurement of flow velocity and flow rate Fluid includes both gas and liquid According to the type and condition of the fluid, or if it flows in a pipe line or open channel, various methods of measurement ... the flow outlet pressure p 2 of fluid, the vertically set gear (Fig 11.1 l(a)) turns in the direction of the arrow Thus, every complete revolution sends out fluid of volume 4 V 11.2.5 Turbine ... form of measuring chamber of constant volume It is then possible to obtain the integrated volume by counting the number of times the volume is filled, and the flow rate by measuring the number of

Ngày tải lên: 22/10/2012, 10:59

... acting on the small element of fluid in Fig 12.1 Since the fluid is an ideal fluid, no force due to viscosity acts Therefore, by Newton’s second law of motion, the sum of all forces acting on the ... force, the equation of motion for this case can be obtained This is the case where the 198 Flow of an ideal fluid Fig 12.1 Balance of pressures on fluid element viscous term of eqn (6.12) is omitted ... Flow of an ideal fluid When the Reynolds number Re is large, since the diffusion of vorticity is now small (eqn (6.18)) because the boundary layer is very thin, the overwhelming majority of the

Ngày tải lên: 22/10/2012, 10:59

... shifts between gases of equal temperature.Therefore, ds = 222 Flow of a compressible fluid Fig 13.1 Propagation of pressure wave + per unit time In order to supplement it, gas of mass Au(p dp) = ... (k:ratio of specific heats (isentropic index)), so (1 3.12) 220 Flow of a compressible fluid cp = -R k (1 3.1 3) C" = ' R (1 3.14) k-1 k-1 Whenever heat energy dq is supplied to a substance of absolute ... = P Here h=e+pv (13.6) According to the first law of thermodynamics, when a quantity of heat dq is supplied to a system, the internal energy of the system increases by de, and work p dv is done

Ngày tải lên: 22/10/2012, 10:59

... valve at the end of the pipe is suddenly closed, the velocity of the fluid will abruptly decrease causing a mechanical impulse to the pipe due to a sudden increase in pressure of the fluid Such a ... Flow 3 Oil of viscosity v = 3 x lo-' m2/s extends over a 3 m length of a tube of diameter 2.5cm, as shown in Fig 14.8 Air pressure in one arm of the U- tube, which produces 40 cm of liquid column ... closed, the flow velocity u of the fluid in the pipe, and therefore also its momentum, becomes zero Therefore, the pressure increases by dp Since the following portions of fluid are also stopped one

Ngày tải lên: 22/10/2012, 10:59

... Introduction Definition of Thermofluids The study of thermofluids integrates various disciplines of the field of thermal sciences This field consists of such topics as thermodynamics, fluid mechanics, and ... Mahmoud Massoud Engineering Thermofluids Thermodynamics, Fluid Mechanics, and Heat Transfer Mahmoud Massoud Engineering Thermofluids Thermodynamics, Fluid Mechanics, and Heat Transfer With 345 ... the definitions and discussion of energy, heat, work, and power to the chapter on thermodynamics In this chapter we introduce thermofluids and discuss the engineering applications of thermofluids...

Ngày tải lên: 02/04/2014, 15:51

... Multiple Modes s Fluid Mechanics Fluid statics Conservation of momentum Mechanical energy equation Similitude and modeling Figure 1.5 The disciplines of thermodynamics, fluid mechanics, and heat ... are the conservation of momentum principle that stems from Newton’s second law of motion and the mechanical energy equation Principles of fluid mechanics allow the study of fluids flowing inside ... transfer analysis Fluid mechanics is concerned with the behavior of fluids at rest or in motion As shown in Fig 1.5, two fundamentals that play central roles in our discussion of fluid mechanics are...

Ngày tải lên: 02/04/2014, 16:45