What is LFM in heat transfer?

In a planar fin heat sink, optimum fin spacing is strongly related to two parameters: flow velocity and fin length in the direction of the flow. Table 3may be used as a guide for determining the optimum fin spacing of a planar fin heat sink in a typical applications. Fin length, mm (in) Flow condition. m/s (lfm)

What is meant by natural convection?

Natural convection is a mechanism of heat transportation in which the fluid motion is not generated by an external source. Instead the fluid motion is caused by buoyancy, the difference in fluid density occurring due to temperature gradients.

Which is the best definition suit for natural convection?

Natural convection is the loss of heat from a hot solid or liquid, without the air around it being moved around by anything or anyone. Related wordsCompare natural convection with forced convection in which the movement of fluid does not happen naturally but is helped by a device such as a fan or pump.

What is neutral convection?

Natural convection is a type of flow, of motion of a liquid such as water or a gas such as air, in which the fluid motion is not generated by any external source (like a pump, fan, suction device, etc.) but by some parts of the fluid been heavier than other parts.

What is difference between natural and forced convection?

In natural convection, any fluid motion is caused by natural means such as the buoyancy effect, i.e. the rise of warmer fluid and fall the cooler fluid. Whereas in forced convection, the fluid is forced to flow over a surface or in a tube by external means such as a pump or fan.

What is natural convection caused by?

Natural convection arises from temperature differences among air parcels, or heat transfer at surfaces (i.e. surface-to-air temperature difference). In the absence of forced convection, natural convection becomes the only means of air mixing inside enclosed spaces.

What is natural convection type evaporator?

In natural convection type, the fluid being cooled flows due to natural convection currents arising out of density difference caused by temperature difference. The refrigerant boils inside tubes and evaporator is located at the top. The temperature of fluid, which is cooled by it, decreases and its density increases.

How do you calculate natural convection?

Natural convection coefficient calculator

1. Plane area A= m2
2. Plane perimeter P= m.
3. Plane height L= m.
4. Angle from vertical °
5. Diameter D= m.
6. Density ρ = kg/m3 Viscosity μ = N*s/m2 Specific heat C = J/kg*K. Thermal conductivity k = W/m*K. Thermal expansion coefficient β = 1/K.