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This work was undertaken to study Che vapor. T Qrtiwc,ion and heat cransfer of multiple layers under both steady state 4nd transient conditions, the change in capacicance between the two sides of Che heated channel is measured to determine the volume fraction of the vapor in the cooling channel-It is JQ««4 that the heat transfer characteristics depend on Che vapor accumulation and the velocity of vapor flow. The vapor locking heat flux is decreased when the vapor accumulation is increased.

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