Results_and_Discussion6

3.4.3.2 Results and Discussion

At the flow along the curved wall, its transition from laminar into turbulent form is well observable because in the case of laminar flow the fringes are contrast and they visualise also the flow shape. In the case of turbulent flow they lose their contrast.

The obtained holographic interferograms (Koniar, 2005) can simplify the study of the flow along the curved wall and can be the stimulus for further research on these problems. They can be utilized in designing of heaters and interchangers where the flow along the curved surfaces occurs.

t∞ = 20 °C, tw = 42 °C, Re = 0	t∞ = 20 °C, tw = 41 °C, Re = 587	t∞ = 20 °C, tw = 41 °C, Re = 606
t∞ = 20 °C, tw = 58,5 °C, Re = 0	t∞ = 20 °C, tw = 58,5 °C, Re = 587	t∞ = 20 °C, tw = 57 °C, Re = 606