Heat pipes have become popular as passive heat diss ipation devices for many applications ranging from electronics to he at recovery in recent years. Pulsating Heat Pipe abbreviated as PHP is a n exclusive category of a heat pipe which does have wick structure . It transfer s heat between its evaporator and con denser sections due to the to and fro movement of working fluid caused due to the continuous change of phase taking place in it. Its operation involves combined hydrodynamic and thermodynamic effects causing the two phase flow, making it difficult to fully under stand it. Nevertheless, the PHPs have drawn the attention of investigators worldwide due to their simplicity in construction and a wide range of applications requiring high heat flux transfer. This review starts with a prologue of the attempts made b y various investigators to explain the operation of PHPs throu gh mathematical modeling. Later numerical simulations through Computational Fluid Dynamics of PHP performed by various investigators have been discussed . Review of latest experimental investigat ions performed on PH Ps, is presented concisely in a tabular form. Novel concepts like the application of nanofluids, magnetic field and surfactant, applied for enhancing the performance of the PHP s have been discussed . At the end , applications of PHP and future scope have been discussed.