Recent content by tonz1984

Hi I work for a manufacturer of LED light fittings. We are going to launch a new product that unfortunatley has two parts aluminium parts that rub together. With our standard anodising, any scratches that are made show up. Is there another method/coating we could use to prevent this, i.e to...

Does anyone know how to calculate the heat transfer coefficient that is used as an interface in Pro E Wildfire 4? I need to know what values I need for copper to aluminium and aluminium to steel. A value in mW/mm^2K, or N/mm SEC C would be ideal.... Copper dims = 8mm * 8mm * 0.1mm, aluminium...

Hi, I am running a thermal analysis on an LED fitting that consists of several LEDs attached to a finned aluminium heat sink. I've applied a heat load to the surface of the LED which represents the power/heat output from the LED. Once the analysis is run the Max Temperature shows what...

Thank you both very much, you've been great help!

Hi IRStuff, thanks for your help, The alu body is made from an alu plate 6mm thick, that is connected to the alu finned section, the steel plate was added in between them. As I understand it, the less heatsinking, the higher the temperature of the LED. But although the K of steel is higher...

Hello I have an aluminium light fitting (see attachment) which has 3 LED's inside. The temperature of the LED's is around 95 degrees under normal operating conditions. When we added in a mild steel plate 0.90mm thick, we expected the temperature of the LED's to rise, but it didn't, the...

Thanks, I was just getting confused from reading about a boundary layer of mean temperature, between the surface and fluid temps. But I'm just going to use ambient / room temperature.

Hello A little help with Pro Mechanica Thermal application is required, any help is really appreciated. When calculating the Grashof number to get 'h' values for the boundary conditions, I input an estimated surface temperature(Ts), and an estimated fluid temperature (Tf). Is this...

Hello I'm using Pro Mechanica, with the 'Thermal' package to show the behaviour of the heat from an LED, through the PCB and heatsink, all exposed to air, at room temperature. The results I get from an actual real-world test are completely different from the Mechanica results. Is the bulk...