Flow in pipe With varying reynolds number

low in pipe (With varying reynolds number)

problem statement

Run a pipe flow simulation with an inlet Reynolds number of 100,1000 and 10,000.

For each of these cases do the following

1. Place line probes at 95%, 90% and 85% of the pipe length.

2. Compare the normalized velocity profile at each of these locations

3. Normalize the velocity profile by the inlet velocity.

Solution :

Simulation set up:

A pipe with diameter .050 m and length 1 m is used to study the flow along the pipe for varying reynold numbers. Change in reynold number leads to changed flow velocities as described below.

Case 1 : Reynold number 1 - 100 velocity 1 - .002008 m/s

pipe diameter - .050 meter

pipe length - 1 meter

Case 2 : Reynold number 2 - 1000 velocity 2 - .02008 m/s

pipe diameter - .050 meter

pipe length - 1 meter

Case 3 : Reynold number 3 - 10000 velocity 3 - .2008 m/s

pipe diameter - .050 meter

pipe length - 1 meter

Cut plots and Probes are inserted at 85 , 90 and 95 percent of the pipe length.

Velocity plot at different location and in defined cut plot . Maximum and minimum values for velocity in the cut plots are set at Global maximum and Global minimum.

Cut plots of velocity at differnt reynold number

1. Reynold number 1 - 100 velocity 1 - .002008 m/s

2. Reynold number 2 - 1000 velocity 2 - .02008 m/s

3. Reynold number 3 - 10000 velocity 3 - .2008 m/s

Velocity plots at different points in pipe.

XY plot 1

Velocity plot of flow at 95 percent of pipe length. ( All three reynold numbers n this study.)

XY plot 2

Velocity plot of flow at 90 percent of pipe length. ( All three reynold numbers n this study.)

XY plot 3

Velocity plot of flow at 85 percent of pipe length. ( All three reynold numbers n this study.)

XY plot 4

Velocity plot of flow including inlet and all other probes placed at different pipe length. ( All three reynold numbers in this study.)

below is the link to all the files and settings used to run this flow study.

https://drive.google.com/drive/folders/16geWsbPW6jWiMer8uyPNsAf7mAD1Z_r6?usp=sharing