Felix Schilya,∗, Wolfgang Polifkea
Frontiers in Heat and Mass Transfer, Vol.17, pp. 1-15, 2021, DOI:10.5098/hmt.17.16
Abstract A simple open-loop pulsating heat pipe model is proposed, which allows to analytically determine the start-up behavior by a linear stability analysis.
Two distinct types of instability can occur in such a pulsating heat pipe: oscillatory and non-oscillatory. This paper demonstrates that for bubbles
consisting of non-condensible gas, large temperature gradients along the wall are required to achieve start-up, whereas start-up is fairly easy to
achieve when there is only a single working medium that forms bubbles from its vapor. The study also finds that surface tension as such only
influences start-up indirectly, while contact angle hysteresis dampens out any… More >
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