Mathematical modeling of heat-and-mass transfer in the heat sink system for the high power LED

Abstract

In this paper we consider the heat and mass transfer in the «base of the LED – crystal – lens – ambient air» on the basis of non-stationary differential equations that describe the complex of interrelated processes. We propose an algorithm for numerical solution the Poisson equations that allows to receive the time of the test process, limit current loads, critical external conditions and the temperature operating modes of the LED. The experimental results of the temperature distribution in real lighting devices are presented.