Figure 6 Velocity profiles for varying values of \(\lambda\)
The velocity profiles for different values of Grashof numberGr is displayed in Figure 7. It revealed that the flow field velocity decreases with increasing values of Grashof numberGr thereby reducing the thermal boundary layer along the sheet.
The viscous dissipation effect on temperature profiles is shown in Figure 8. It illustrates that temperature increases wit increase in Eckert number (viscous dissipation parameter Ec). The Eckert number produces heat due to drag between the fluid particles causing an increase of the initial fluid temperature due to the extra heat. However, Ec may not only cause thermal reversal but also increases the thermal boundary layer \(\mathbf{[22]}\).
Figure 9 shows the effects of Prandtl number of temperature profiles. It depicts that temperature initially increases with increasing values of Prandtl number \(\Pr\) and later decreases with increased values of\(\Pr\) towards the thermal boundary layer. The use of Prandtl number in heat transfer problems reduces the relative thickening of the momentum and the thermal boundary layer \(\mathbf{[22]}\). Thus, the rate of heat transfer is enhanced with \(\Pr\) causing the reduction of the thermal boundary layer thickness \(\mathbf{[22]}\).