目前很多水的核态沸腾都观察到了汽泡顶部射流的现象.本文分析了沿细丝运动的汽泡顶部产生射流的物理机理,并通过对汽泡和加热细丝周围温度场和速度场的数值求解来进行分析.结果显示:由汽泡前后表面的温度梯度引起的热射流很可能是流动的最主要原因.热射流能够推动汽泡前进.对比和试验的观测指出,不凝气体或者其他可能的机理将限制汽泡界面处的凝结换热,从而增大表面温度梯度,增强热射流.
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