Tài liệu về " chuyên đề vật lý " 15 kết quả
Introduction to fluid mechanics - P1
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text 123doc.vn
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Introduction to fluid mechanics - P2
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... Kinematic viscosity B Y units 0 1 0 0 m kg -3 -1 1 1 -1 -1 -2 -2 -2 -2 -1 -1 S mls m/s2 kg I m3 N = kg m/s2 Pa = N/m2 J Pa s m2/s Characteristics of a fluid 2.2.2 Dimension All physical quantities... proportional to the velocity gradient duldy ...
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Introduction to fluid mechanics - P3
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... semiconductor strain gauge PGM-C Pressure range (MPa) Natural frequency (kHz1 Response frequency (kHz1 PE-J, P (a) Small size 0. 2-1 o 2 5-4 0 5-8 (b) For indicating pressure of an engine 5-2 0 2 5-4 0 5-8 ... pdAor ( ) p+-dz dA-pgdAdz=O 24 ...
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Introduction to fluid mechanics - P4
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... direction moves to A‘B’ while rotating by dq, and AD in the y direction rotates by de, Thus av de - - dxdt - ax at4 d = dydt E aY de - L = - d av d~ t I - dx ax de = dt dE2 dy au ? ?- ay The angular... case of two-dimensional flow where w = V ...
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Introduction to fluid mechanics - P5
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... momentum: - (D’ increase in momentum: R - d2)pu: 71 -p[D2u: 71 + -d’pui - (0’ - d2)u: - d’ui] 71 force acting on the fluid: -D’(p, - p ) By the law of momentum, ~ [ D ’ u - (D’ - d2)u: - d ’ ~... respectively Then from Bernoulli’s equation Pl ...
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Introduction to fluid mechanics - P6
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... following equation: a u a u au du = -dt + dx -dy at ax ay + Therefore, du _ - -au + -audx- ~ -audy- + ~ -+ +u dt at axdt aydt at au ax aU ay Substituting this into eqn (6.4), Next, the force F acting... d y = -h3 dP 12pdx From this equation, ...
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Introduction to fluid mechanics - P7
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... efficiency q for a diffuser is therefore P2-P1 - q=-P2th - PI hs (0: - U:)/2s (7.31) Substituting in eqn (7.28), the above equation becomes q = - c - 02 - - + 02 - Al/A2 + Al/A2 (7.32) Convergent pipe... losses in pipe lines 125 P P -+ - v: = ...
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Introduction to fluid mechanics - P8
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... (8.6) and (8.7) (-) v =- A 2''3i1,2 n s Q = -1 i A5/3 - ll2 n s2I3 A = r2(;) - ?cos(;) = r2(e- sin e) sin(;) s = re ( m = - 1-2 r si:e> i.e n -T)] Z( 1-7 ) sin ''I3 v=-i112[;(1 Q = -i''121 n sine ''I3... cross-sections are uniform and whose ...
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Introduction to fluid mechanics - P9
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... Bernoulli’s equation produces the following result: u2 Pd +P2 +2 pm -= p P-Pm= -? ??-Po, PU2/2 p(U2 - Ui) (1 -4 sin28) - pu’ - -4 sinz0 (9.6) The drag of a body 151 Table 9.2 Drag coefficients for... Drag and lift L=2 -( p-p,)rodBsin8 1n/2 ( ...
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Introduction to fluid mechanics - P10
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... = [L-’MT-’][L-3M]“[L T-’]’[L]” - L 1-3 x+y+zMl+xT-l-y (10.5) i.e L: - I - ~ x + Y + z = O M: T: l+x=O -l-y=O Solving the above simultaneously gives x =-1 y =-1 z =-1 Substituting these values into... the first non-dimensional group n, formed ...
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Introduction to fluid mechanics - P11
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... _ -1 tl t2 - Fig 11.14 Ultrasonic flowmeter Q -k UCOS6 t, = a - Ucose a + u c o s e - a - u c o s e - 2ucose 1 Measurementof flow discharge 193 where a is the sonic velocity in the fluid From...Measurement of flow velocity 183 Fig 11.1 NPL-type ...
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Introduction to fluid mechanics - P12
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... (12.18) aw aw dw=-dx+-dy= ax ay = (u - iu)dx + (u + iu)dy = (u - iu)(dx + i dy) = (u - iu)dz Therefore dw _ - -1 u -u dz (12.19) Consequently, whenever w(z) is differentiated with respect to z, as shown... ideal fluid Fig 12.1 Balance of ...
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Introduction to fluid mechanics - P13
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... the following equations: & - = c dq T " - -T - = c dp- - ( k -d Tc dR c, l) T p T dP OP Sonic velocity 221 s - s1 = s2 - s1 = c"log[ s2 - s1 T ,( , ;f, "il ] (9k(;)k-1] (13.19) ( 13.20) = culog[y''... variables in the vessel), eqn (13.37) gives ...
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Introduction to fluid mechanics - P14
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... the sectional area of the pipe, pgAldu p g A ( H - h, - h2) = -9 dt (14.15) giving h - k - - =1 kv2I - d2g v2 2g h - - v2 - 2g and v2 Edv H-(k+l )-= -( 14.16) 2g s d t Assume that velocity u becomes... - 2-/ 3 ( 4.13) v Substituting eqns ...
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Introduction to fluid mechanics - P15
Cơ học chất lỏng - Tài liệu tiếng anhFront Matter PDF Text Text Preface PDF Text Text Table of Contents PDF Text Text List of Symbols PDF Text Text ... Fig 15.2 Flow in a sudden expansion -9 a* - *,+I,] ax aY - *1,1+1 ay2 Fig 15.3 Grid mesh and grid points - - *1, 1-1 2h * 1-1 .] - 2*8,1 *l,l-, -2 k1 ax2 e 3- - *l-,,, 2h + *,+I,] h2 h2 + *1,1+1 '' (15.9)... method 253 ii,j =t(C-1.j + li,j-i ...
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