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请教一下各位，我做的圆环管道的传热，内壁面恒定热流(fixedGradient=1000)，外壁面绝热，流向是周期性边界条件，然后我做出来的温度，只要时间变长，温度就一直变高，没有上限,请问为什么我这里的温度不会稳态而是一直升高呢？
你有热通量输入到计算域里，但是没有边界让输入的热量离开，系统的温度无法达到统计稳态那就自然随着时间不断提高了
