Convection heat transfer in pulsating turbulent flow with large velocity oscillating amplitudes in a pipe at constant wall temperature is numerically studied. A low-Reynolds-number (LRN) k–e turbulent model is used in the turbulence modeling. The model analysis indicates that Womersley number is a very important parameter in the study of pulsating flow and heat transfer. Flow and heat transfer ...

The pulsating heat pipe (PHP) can be used to transfer massive reduce the thermal damage cutting tool when machining difficult-to-cut materials. To select a better open PHP, performance was experimentally investigated in this study. operating characteristics of different types working fluids under flux were analyzed compared with closed PHP. Visual experiments established verify experimental cha...

The pulsating heat pipe is a very promising dissipation device to address the challenge of higher heat-flux electronic chips, as it characterised by excellent transfer ability and flexibility for miniaturisation. To boost application PHP, reliable performance evaluation models are especially important. In this paper, correlation was firstly proposed closed PHP with various working fluids (water...

In this study an analytical model for open loop pulsating heat pipes (PHPs) is presented. The model predicts the effect of different parameters such as evaporator temperature, length of evaporator, filling ratio, number of turn and tube diameter on PHP's performance. The governing equations in two phase flow including mass, momentum and energy equations are solved for both one dimensional liqu...

Abstract Heat exchanger optimization is mandatory in almost any industrial application. Thanks to their performances, the Pulsating Pipes (PHPs) are a very interesting Micro-PHPs, which defined as PHPs with tube that has hydraulic diameter < 500 μm, have shown big advantages terms of ability dissipate high heat fluxes, reduced size, and low weight. However, great majority works investigate t...

Heat pipes have become popular as passive heat dissipation devices for many applications ranging from electronics to recovery in recent years. Pulsating Pipe abbreviated PHP is an exclusive category of a pipe which does wick structure. It transfers between its evaporator and condenser sections due the fro movement working fluid caused continuous change phase taking place it. Its operation invol...

The Pulsating (called also oscillating) Heat Pipe (PHP) is a high performance passive heat transfer device. It consists in closed capillary channel folded into several meanders, evacuated, and partially filled with liquid its vapor. One side thermal contact hot spot, the other cold spot. oscillation of plugs vapor bubbles spontaneously occurs after heating beginning. exchange takes place not on...

A Pulsating Heat Pipe (PHP), specifically designed to be hosted on board the Transfer Host of International Space Station, is tested in microgravity conditions during 67th Parabolic Flight Campaign promoted by European Agency. The device consists an aluminium tube (inner/outer diameter = 3/5 mm) closed a 14 turns loop, half filled with FC-72. PHP external wall temperature distribution are measu...

Pulsating heat pipe is one of the prominent technology for thermal management electronic devices. It consists three sections namely evaporator, adiabatic and condenser section. PHP a two phase passive device having efficient quick ability transferring from evaporator section to At first an 8 turn pulsating closed loop ends (CLPHP) with copper tube capillary dimensions investigated experimentall...