LPBF is a laser-based powder bed fusion technique where selective melting of powder material using a high-energy moving laser beam gets solidified upon cooling to produce the final part. Hence the maximum temperature may go beyond the melting point and is subjected to rapid heating and cooling cycles. Performing numerical simulation is a promising method to predict the field variables such as temperature and stress rather than experimentation that adds time and cost. Thus, a numerical model is designed to accurately analyse the temperature field during LPBF processing of stainless steel 316L by utilizing temperature-dependent physical properties, phase change, and heat transfer. Results from the numerical simulation show that during LPBF temperature rises above melting and then solidifies upon cooling. This validates that rapid heating and cooling sequences exist in the 316L fabrication via the LPBF process.