DISCUSSION General meaning of laminar, transition and turbulent flow is important before conduct this experiment. For laminar flow, it is defined as a highly ordered fluid motion with smooth streamlines. In contrast, turbulent flow is a highly disordered fluid motion characterized by velocity and fluctuations and eddies. Transition flow is known as a flow that contains both laminar and turbulent regions. In Reynolds apparatus experiment, laminar flow is obtained when a single ordered line is seen after a thin filament of dye is injected into the transparent glass tube. A small amount dispersion of dye can be observed throughout the flowing fluid. As for turbulent flow, lines of dye breaks into myriad entangled threads of dye therefore it shows obvious dispersion of dye. Throughout the experiment, the red dye line starts flowing in a straight ordered line through the glass tube, and as the velocity increases after some time, the ordered streamlines is seen to begin to disperse at about the middle of the streamlines, but still remain the straight line at the earlier part. Next, the dispersion started to increase, indicating the transition flow followed by turbulent flow. In order to calculate the range for the laminar and turbulent flow , Reynolds number formula is used. The area of bell mounted glass tube, the viscosity of water and the density of water are needed. The density of water is 1000 kg/m3, the area of glass tube is 1.91x10-4 m2, while the Kinematics viscosity for 25C water is 0.89 x 10-6 m/s. The volume of water is collected for 10 second and repeat for 3 times in order to get precise value. Then, from the volumetric flow rate can lead the calculation to find velocity. Last step of calculation is calculating the Reynolds number using the Reynolds equation. From Reynolds number calculated, the condition of the flow can be estimated whether it is laminar, transition or turbulent by comparing with appropriate given Reynolds number range.The average Reynolds number value for laminar flow is 238.60, 2483.91 for transition flow and lastly 13031.35 for turbulent flow. From this value, Reynolds number formula can be estimate as Re < 2100 is laminar flow, if 2100 < Re < 4000 is transitional flow and if Re > 4000 is turbulent flow. The calculation also can proved that the Reynold number formula is dimentionless.

Finally the characteristic between laminar and turbulent flow can be differentiate.As for laminar flow, it can be steady and unsteady , can be one, two, or three dimensional and occurs at low Reynolds number. While as for turbulent flow, it always unsteady because there are always random and swirling motions. Beside that, it always three dimensional and occurs at high Reynolds number.