Tabelle

Pagina 1

CORRELATIONS f  p0.790 lnpReq
1.64q
2 f  64{Re N u  2 p0.44Re0.5 0.066Re0.667 qP r0.4 N u  p0.0376Re0.8
871qP r1{3 1{3 1{3 N ux  0.332Re0.5 x Pr N ux  0.0296Re0.8 x Pr   { 
4{9 9 16 Nu  2 N u  3.66 0.25 0.469 0.0668GzL 0.589Ra 1 { # #1 Pr 2 3 0.04GzL cooling : Tw Tb ñ n  0.3 Ra 109 C  0.59 n  1{4 N u  0.023Re0.8 P rn N u  CRan heating : Tw ¡ Tb ñ n  0.4 Ra ¥ 109 C  0.10 n  1{3 # # { fluid above the surface Ts ¡ Tf { N uL  N uL  1 3 1 4 fluid above the surface Ts Tf fluid below the surface Ts ¡ Tf 0.15RaL 0.27RaL fluid below the surface Ts Tf N u  CRem P r1{3 C m N u  CRam C m Re P r4  101 ; 4  103 q 0.683 0.466 Ra P r102 ; 104 q 0.850 0.188 Re P r4  103 ; 4  104 q 0.193 0.618 Ra P r104 ; 107 q 0.480 0.250 Re P r4  104 ; 4  105 q 0.027 0.805 Ra P r107 ; 1012 q 0.125 0.333 One-term approximation T pz, tq
T8 Tm ptq
T8 θ θm  Ti
T8 Ti
T8 R Fo y sinpλq thickness F o  2 y  θ  C expp
λ2 F oq cospλy q θ  C expp
λ2 F oq αt z Plane 2J1 pλq R R λ Fo  2 y  θ  C expp
λ F oqJ0 pλy q θ  C expp
λ F oq αt z 2 2 Cylinder radius Sphere radius R Fo  2 y  αt R z θ  C expp
λ2 F oq sinpλy q λ θm  3 expp
λ2 F oqrsinpλq
λ cospλqs 3C R R λy λ Coefficients used in the one-term approximation Bi 0.2 0.4 0.6 0.8 1 2 4 6 8 10 50 8 Plane λ 0.433 0.593 0.705 0.791 0.860 1.078 1.265 1.349 1.398 1.429 1.539 1.571 wall C 1.031 1.058 1.081 1.102 1.119 1.179 1.229 1.248 1.257 1.262 1.273 1.273 Cylinder λ 0.617 0.851 1.019 1.149 1.256 1.600 1.908 2.050 2.128 2.179 2.355 2.4048 C 1.048 1.093 1.135 1.173 1.207 1.339 1.470 1.526 1.552 1.568 1.600 1.602 Sphere λ 0.759 1.053 1.265 1.432 1.572 2.030 2.456 2.652 2.766 2.836 3.076 3.142 C 1.059 1.116 1.171 1.224 1.274 1.480 1.720 1.833 1.892 1.925 1.996 2.000 Blackbody radiation function λT rµm  K s 2000…