This is the procedure I followed to find out the Drag coefficient of cylinder, but the values are showing wrong. please run a test on it and share your knowledge with me.
Size: Dia 48.3x1000 mm.
Wind Velocity in X Direction = 47M/S
Input Data: General Settings
Analysis type – External
Fluids: AIR (Gases)
Flow type: Turbulent
Thermodynamic Parameters:
Parameters - Pressure, Density
Pressure- 1325 Pa
Density 1.2kg/m^3
Velocity Parameters:
Velocity in X Direction: 47 m/s
Velocity in Y Direction: 0 m/s
Velocity in Z Direction: 0 m/s
Computational Domain Size:
X, -X | Y, -Y | Z, -Z |
Study1 0.6, -6m | 1.0, -1.0 m | 0.6, -0.6 m |
Study2 0.8, -0.8m | 1.0, -1.0m | 0.8, -0.8 m |
Study3 1.0, -1.0 | 1.0, -1.0m | 1.0, -1.0 m |
Study4 1.2, -1.2 | 1.0, -1.0m | 1.2, -1.2 m |
Goals:
Applied Equation:
({GG Force (X) 1} *2)/ (1.2*47^2*3.14*0.5*.0483*1.0)
({SG Force (X) 1} *2)/ (1.2*47^2*3.14*0.5*.0483*1.0)
Standard Values: Cft – 1.0 (Dvd <6) Cft is the required result as per standard.
(Standard Values Reference from IS 875 Part 3 Link mentioned below)
IS 875 Link (https://archive.org/details/gov.law.is.875.3.1987) Page no:40 Table no: 23
Achieved Values:
Global Goal | Surface goal | ||
Cf Value | Average | Cf Value | Average |
Study1 0.88 | 0.87 | 0.88 | 0.87 |
Study2 0.88 | 0.87 | 0.88 | 0.87 |
Study3 0.89 | 0.88 | 0.89 | 0.88 |
Study4 0.89 | 0.88 | 0.89 | 0.88 |
