Abstract
Runway pavements receive three different thermal loads; those are solar radiation, tire friction and jet engine exhaust. These three thermal loads have different characteristics of heat transfer conduction. The steady and time-dependent heat transfer control the temperature fluctuation in pavement layers. This temperature fluctuation may cause asphalt hardening and lead to premature pavement functional distress. This paper's aim is to evaluate the available numerical approaches in determining the temperature gradient. The evaluation starts with establishing the magnitude of the considered load. The challenge is to determine the conduction process of the heat load produced by the jet exhaust. This heat load characteristic shows that the temperature of the ejected gas gradually decreases in line with the distance from the jet nozzle. This paper presents the selection of the numerical approach of the combination steady and time-dependent heat load.
