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Coeficientes de rugosidad (haestad)
Coeficientes de rugosidad (haestad)
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Dec 20, 2012
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Material
Coeficiente
de Manning
n
Coef. Hazen-
Williams
CH
Coef. Rugosidad
Absoluta
e (mm)
Asbesto cemento 0.011 140 0.0015
Latón 0.011 135 0.0015
Tabique 0.015 100 0.6
Fierro fundido (nuevo) 0.012 130 0.26
Concreto (cimbra metálica) 0.011 140 0.18
Concreto (cimbra madera) 0.015 120 0.6
Concreto simple 0.013 135 0.36
Cobre 0.011 135 0.0015
Acero corrugado 0.022 -- 45
Acero galvanizado 0.016 120 0.15
Acero (esmaltado) 0.010 148 0.0048
Acero (nuevo, sin recubrim.) 0.011 145 0.045
Acero (remachado) 0.019 110 0.9
Plomo 0.011 135 0.0015
Plástico (PVC) 0.009 150 0.0015
Madera (duelas) 0.012 120 0.18
Vidrio (laboratorio) 0.011 140 0.0015
(Fuente: Computer Applications in Hydraulic Engineering, 5
th
Edition, Haestad Methods)
Valores Típicos de Coeficientes de Rugosidad
Temp.
o
C
Peso Espec., γ
(kN/m
3
)
Densidad, ρ
(kg/m
3
)
Visc.Abs., µ
(10
-3
N-s/m
2
)
Visc. Cin., ν
(10
-6
m
2
/s)
Pre. Vap., pv
(kN/m
2
)*
0 9.805 999.8 1.781 1.785 0.611
5 9.807 1000.0 1.518 1.519 0.872
10 9.804 999.7 1.307 1.306 1.230
15 9.798 999.1 1.139 1.139 1.710
20 9.789 998.2 1.002 1.003 2.34
25 9.777 997.0 0.890 0.893 3.17
30 9.765 995.7 0.798 0.800 4.24
40 9.731 992.2 0.653 0.658 7.38
50 9.690 988.0 0.547 0.553 12.33
*Presión absoluta
(Fuente: Fluid Mechanics with Engineering Applications, Tenth Edition, McGraw-Hill)
Propiedades físicas del agua para una presión atmosférica estándar al nivel del mar
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