Forced convection over a cylinder

In summary, the conversation is about building an apparatus to measure the effect of fluid speed on heat transfer from a solid object. The experiment involves a cylinder with a constant inner temperature, and the individual is wondering if they can use a previously calculated correlation between Nusselt number, Reynolds number, and Prandtl number for a flat plate in their calculations for the cylinder. They are seeking opinions on whether this is a safe approach and why."
  • #1
gasperz
1
0
I am building an apparatus to measure how does fluid speed effect heat transfer from solid on fluid. fluid runs over a cylinder which inner side is kept at a constant temperature. A calculation for surface temperature profile was made for a similar eaxperiment were a flat plate was used instead of a cylinder. I would like to ask weather it is safe to use the same correlation between the nuslet number and reynolds number:
Nu=C/m * Re˘m * Pr˘n
where C = 0.332, m = 1/2 and n = 1/3 for a laminar boundary layer
and C = 0.0287, m = 4/5, n = 3/5 for a turbulent boundary layer
and therefore if calculations for surface temperature profile calculations made for flat plate alo apply for cylinder.
Thank you for your answers
 

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  • #2
What do you think and why?
 

1. What is forced convection over a cylinder?

Forced convection over a cylinder is a type of heat transfer that occurs when a fluid (such as air or water) is forced to flow over a cylinder due to external factors, such as a fan or pump. This process helps to transfer heat away from the cylinder, making it an important mechanism for cooling in many engineering applications.

2. How does forced convection over a cylinder differ from natural convection?

In natural convection, heat transfer occurs due to density differences in a fluid resulting from temperature gradients. In forced convection, the fluid is forced to flow over the object, increasing the rate of heat transfer. This can be achieved through external means, such as a fan or pump.

3. What factors affect forced convection over a cylinder?

The rate of heat transfer in forced convection over a cylinder is influenced by several factors, including the velocity of the fluid, the properties of the fluid (such as density and viscosity), the size and shape of the cylinder, and the temperature difference between the fluid and the cylinder.

4. How is forced convection over a cylinder modeled and analyzed?

Forced convection over a cylinder can be modeled and analyzed using mathematical equations, such as the Navier-Stokes equations, which describe the motion of fluids. These equations can be solved numerically using computational methods to determine the heat transfer rate and other important parameters.

5. What are some practical applications of forced convection over a cylinder?

Forced convection over a cylinder is commonly used in various engineering applications, such as in the cooling of electronic components, engines, and turbines. It is also important in the design of heat exchangers and other systems for efficient heat transfer. Understanding forced convection over a cylinder is crucial for optimizing these processes and improving overall efficiency.

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