- #1
ngc2024
- 15
- 0
Lately, I have conducted an experiment where I dragged various circular cylinders through water in order to find the resistance, and hopefully also the drag coefficient. It seems to me that this coefficient is dependent on what is called the Reynolds number. Using some sources, I can easily find the drag coefficient as a function of this number for cylinders. The problem, however, is that these are only for where the flow of the water is perpendicular to the height of the cylinder. In other words, the water meets the curved part of the cylinder. My question is if anybody knows where I can find a graph of the drag coefficient of a circular cylinder as a function of the Reynolds number, where the water flow meets the top (the flat part) of the cylinder?
Secondly, I understand that the Reynolds number is calculated accordingly;
R=V*L/μ
where V is velocity, L is a length scale, and μ is dynamic viscosity divided by the density.
Would L euqal the radius in my scenario?
Furthermore, from what I can gather, the relationship between the Reynolds number and the drag coefficient can only be confirmed experimentally, and therefore, I have no way of finding a solution analytically.
Thank you for considering this problem
Secondly, I understand that the Reynolds number is calculated accordingly;
R=V*L/μ
where V is velocity, L is a length scale, and μ is dynamic viscosity divided by the density.
Would L euqal the radius in my scenario?
Furthermore, from what I can gather, the relationship between the Reynolds number and the drag coefficient can only be confirmed experimentally, and therefore, I have no way of finding a solution analytically.
Thank you for considering this problem