Table 9

Thermophysical properties of Al2O3 + H2O nanofluid for different wall temperatures and concentration
Properties Values
At T = 324 K, dp = 10 nm, ε = 0.72 Φ 0 0.01 0.02 0.03 0.04 0.05 0.06 0.09
ρ (103) 0.998 1.0268 1.0556 1.0845 1.1133 1.1421 1.1709 1.2574
βnf (103) 0.214 0.2062 0.1989 0.1919 0.1853 0.179 0.1731 0.1568
Cpnf (103) 4.187 4.1871 4.1872 4.1873 4.1874 4.1875 4.1876 4.1878
μnf 0.0007 0.0007 0.0008 0.0009 0.0009 0.001 0.0011 0.0016
knf 0.6288 0.7281 0.7857 0.8339 0.8768 0.9161 0.9529 1.0523
keff 0.8728 1.0106 1.0905 1.1573 1.2167 1.2713 1.3222 1.46
αeff (10−6) 0.2089 0.235 0.2467 0.2548 0.261 0.2658 0.2697 0.2773
Preff 3.358 3.0766 3.0441 3.0801 3.1656 3.2973 3.4795 4.4709
RaKeff 172.7511 143.4813 126.9420 113.4505 101.6234 90.8972 80.8972 53.9553
Σ 0.9505 0.944 0.9379 0.9321 0.9266 0.9214 0.9164 0.9029
At T = 317, dp = 10 nm Φ 0 0.01 0.02 0.03 0.04 0.05 0.06 0.09
knf 0.6288 0.7079 0.7538 0.7922 0.8264 0.8577 0.887 0.9662
keff 0.8728 0.9826 1.0462 1.0995 1.1468 1.1903 1.2309 1.3407
αeff (10−6) 0.2089 0.2285 0.2367 0.2421 0.246 0.2489 0.251 0.2546
Preff 3.358 3.1643 3.1728 3.242 3.3584 3.5216 3.7376 4.8687
RaKeff 133.7428 114.2469 102.4320 92.4494 83.4695 75.1410 67.2753 45.4884
At T = 310 K, dp = 10 nm Φ 0 0.01 0.02 0.03 0.04 0.05 0.06 0.09
knf 0.6288 0.6915 0.7279 0.7584 0.7854 0.8103 0.8335 0.8963
keff 0.8728 0.9598 1.0103 1.0525 1.0901 1.1245 1.1567 1.2438
αeff (10−6) 0.2089 0.2232 0.2286 0.2318 0.2338 0.2351 0.2359 0.2362
Preff 3.358 3.2393 3.2857 3.3867 3.5334 3.7276 3.9773 5.2482
RaKeff 94.7345 82.8428 75.1371 68.4071 62.2040 56.3387 50.7101 34.7324
At T = 303, dp = 10 nm Φ 0 0.01 0.02 0.03 0.04 0.05 0.06 0.09
knf 0.6288 0.6783 0.707 0.731 0.7523 0.7719 0.7902 0.8398
keff 0.8728 0.9414 0.9812 1.0145 1.0441 1.0713 1.0967 1.1654
αeff (10−6) 0.2089 0.219 0.222 0.2234 0.224 0.224 0.2237 0.2213
Preff 3.358 3.3026 3.383 3.5135 3.6888 3.9128 4.195 5.6014
RaKeff 55.7261 49.6834 45.5077 41.7463 38.2001 34.7866 31.4619 21.8057

Uddin and Harmand

Uddin and Harmand Nanoscale Research Letters 2013 8:64   doi:10.1186/1556-276X-8-64

Open Data