FLOW OVER A CYLINDER https projects skill-lync com projects flow-over-a-cylinder-95281
https://projects.skill-lync.com/projects/flow-over-a-cylinder-95281
FLOW OVER A CYLINDER
AIM:
To do a flow simulation over cylinder for different reynolds numbers
PROCEDURE:
- Create an circle for diameter of 55 mm and extrude it at a hight of 150mm in the frontal plane.
- open the flow simulation wizard and create an time dependent external flow simulation with initial velocity of 10 m/s in X direction
- The reynolds number can be calculated using the formula re=rho.u_inlet.D/viscosity . After calculating the reynolds number increase the reynolds number by 20%,40%,100% respectively and hence calculate the velocity
- For calulated velocity create an external flow simulation and define the global mesh to 5.
- For each of the simulation the cut plot was created in the frontal plane and the velocity and pressure analysis was done and the animation was created
- Enter the animation wizard and create an animation for 15 sec for selected cut plot and new control points are inserted and is extended through full time line and animation are saved
- density of air =1.225 kg/m3 viscosity of air=1.81*10-5m2/s
RESULT:
for velocity of 10m/s and reynolds number of 37223
velocity anaylsis
pressure analysis
Animation for above conditions are follows:
velocity
https://drive.google.com/open?id=1VNXnhUO6SW9TtCKwdbEcJgwaVG3G6Ysy
pressure
https://drive.google.com/open?id=1bqlntuPcp7H7RC1zyyjJ6B7f5ywtG1lI
FOR VELOCITY =12m/s REYNOLDS NUMBER =44667
velocity
pressure:
animation of above conditions are as follows
velocity:
https://drive.google.com/open?id=17C8PAw1Q7dx_fUUTL-kYSUU4F5HXRvzQ
pressure:
https://drive.google.com/open?id=1gEmLKVopxAanBc76xRCMnFOWHssTCXnC
FOR VELOCITY OF 14m/s AND REYNOLD NUMBER OF 52112
velocity:
pressure:
ANIMATIONS ARE AS BELOWS :
velocity:
https://drive.google.com/open?id=1T_1vZtJUzTgi4LPXrczTK2YC7iefa3a9
pressure:
https://drive.google.com/open?id=1mIrO7KJtJSZbRp6IOXuXli_hGZauTM7c
FOR VELOCITY =20m/s and REYNOLDS NUMBER OF 74446
velocity
pressure:
ANIMATIONS ARE AS FOLLOWS :
velocity
https://drive.google.com/open?id=175CkPQbQuyFk_Hf4vdaHkrKBQHM24iA8
pressure:
https://drive.google.com/open?id=1L3FpoKQhPUiSRN6QeEXcd4jMbkPzVXEI
From the above observation we note that with increase of reynolds number velocity also increases and the velocity , pressure are higher near the walls of the cylinder and becomes lesser away from the walls . With increase of velocity , the pressure near cylinder walls increases and from animation how velocity and pressure changes