How do you find the heat transfer coefficient of a Nusselt number?

How do you find the heat transfer coefficient of a Nusselt number?

Formula

1. Nusselt Number : Nu = hL/k.
2. Convection Heat Transfer Coefficient : k = Nuk/L.
3. Characteristic Length : L = Nuk/h.
4. Thermal Conductivity of the Fluid : k = hL/Nu.
5. Where, Nu = Nusselt Number, h = Convection Heat Transfer Coefficient, L = Characteristic Length, k = Thermal Conductivity of the Fluid.

What does Reynolds number depend?

In 1883 Osborne Reynolds, a British engineer and physicist, demonstrated that the transition from laminar to turbulent flow in a pipe depends upon the value of a mathematical quantity equal to the average velocity of flow times the diameter of the tube times the mass density of the fluid divided by its absolute …

What is the significance of Reynolds Number Class 11?

Reynolds number is a dimensionless number, whose value gives an idea whether the flow would be turbulent or laminar. Types of flow are classified as 2 types:laminar flow and turbulent flow. Reynolds number helps us to determine whether the flow is laminar or turbulent.

How does Reynolds number effect flow?

The Reynolds number (Re) helps predict flow patterns in different fluid flow situations. At low Reynolds numbers, flows tend to be dominated by laminar (sheet-like) flow, while at high Reynolds numbers flows tend to be turbulent. Reynolds numbers are an important dimensionless quantity in fluid mechanics.

How does flow rate affect heat transfer coefficient?

The heat transfer coefficient decreases by ˜10% with a threefold increase in the mass flow rate under these conditions, based on the commonly used Dittus-Boelter correlation for estimation of the heat transfer coefficient. Doubling the mass flow rate will result in a 92% increase in the heat transfer coefficient.

What are the advantages of laminar flow?

Laminar is a flow phenomenon where the fluid flows in layers without any disruption between and among the layers. The main advantage of assuming laminar flow across a conduit is that, it provides an easy job to analyze the fluid flow using CFD softwares.