Heat Sink Fin Orientation

Air heats and moves up if the fins are horizontal this will be hindered.

Heat sink fin orientation.

Wesley lee nov 1 16 at 12 54. The heat sink should be oriented as in fig 1 or fig 2 under natural convection cooling. An advantage of bonded fin designs is that the heat sink base and the fins can be of different metals. Experimental setup and analysis method.

The experimental setup is. And the radiation is omnidirectional. In which case the orientation of the fins will probably make less of a difference. Test results indicate that the sideward horizontal fin orientation yield the lowest heat transfer coefficient.

You haven t mentioned if you have forced air flow i e. It is assumed that the device to be cooled is properly mounted and the heat sink is in its normally used mounting orientation with respect to the direction of air flow. A trapezoidal fins heat sink with various orientations tested under a controlled environment. Typically the fins are oriented in a way to permit a natural convection air draft to flow upward through rectangular u channels or ducts formed by the fins.

Unique fin requirements thermal engineers sometimes need heat sinks with either very tall fins or very thin fins that are tightly spaced. The first plot traveling from the lower left to the upper right is the natural convection curve of heat sink temperature rise tsa versus q. It is recommended that the heat sink be installed to orient the fins in a direction that will not block air movement under natural convection. Heat sinks are devices that are used to enhance heat dissipation from hot surfaces to cooler ambient air.

However the sideward vertical fin orientation gave the best performance on the natural cooling. Heat sink attachment orientation plays a significant role under natural convection. Respectively bonded fin heat sinks and skived fin heat sinks suit these requirements nicely. Light emitting diode led light source is known as the 4th generation illumination technology because.