Table 3 Comparison of Nusselt number, Nu of full-form viscosity function (11) and cut-off viscosity function (13) for \(\mu = 0.0\) and \(\mu = 0.5\) at \({\mathrm{Ra}} = 10^7\) and \(\theta _0\) = 0.1
\(\Delta \eta\) | Full form \(\eta\) | Cut-off \(\eta\) | ||
|---|---|---|---|---|
\(\mu = 0.0\) | \(\mu = 0.5\) | \(\mu = 0.0\) | \(\mu = 0.5\) | |
\(10^{10}\) | 6.76217 | 8.06845 | 6.76800 | 8.06845 |
\(10^{15}\) | 5.35744 | 6.98327 | 5.36157 | 6.98490 |
\(10^{20}\) | 4.44652 | 6.29296 | 4.45036 | 6.29310 |
\(10^{25}\) | 3.79703 | 5.79253 | 3.80090 | 5.79442 |
\(10^{30}\) | 3.25274 | 5.39134 | 3.25696 | 5.39304 |