Numerical Simulations of Pulsating Heat Pipes, Part 1: Modeling

Innovations in pulsating heat pipes: From origins to future perspectives

“…Since the late 1990s the scientific community devoted its efforts to model the PHP complex thermohydraulic behaviour with different strategies. So far in the literature, six main approaches can be found: continuum wave propagation (CWP) [34]- [36], spring-mass-damper (SMD) modelling [37], [38], the artificial neural networks (ANNs) [39]- [41], empirical correlations [40][42], CFD models [43], [44], 1-D dynamic models [45]- [47].…”

“…Nevertheless, 2-D and 3-D tools can be used to investigate the local heat transfer phenomena occurring at the microscale level and, once validated, exploited by 1-D dynamic models. At present, the liquid film dynamic modelling [18] is one of the most critical aspect that is starting to be implemented by the most updated codes in the literature [45]- [47], nevertheless, the author suggests that each numerical model should be validated not only with the overall evaporator temperature behaviour observed experimentally but with more detailed local data. In this regard, the paper by Rouaze et al [49] published in this special issue resumes the last updated version of the variable thickness wedge film model firstly proposed by Professor Thome's research group [50].…”

Physical principles and state-of-the-art of modeling of the pulsating heat pipe: A review

“…This model is for L a = 0 and the imposed constant temperatures of both evaporator and condenser. More recently, this model was updated to include the fluid-solid thermal coupling [143]. An extensive regime analysis has been performed for the R245fa fluid for different fill ratios and number N p of turns ranging from 1 (single loop PHP) to 24.…”