Cross-current transfer processes in the non-steady state

Abstract
The steady and non-steady states of cross-current transfer processes are analyzed mathematically for conditions where there is no mixing in either stream. Solutions are obtained which enable non-steady conditions to be followed quantitatively, whether they are caused by continuous or discontinuous regular or by random variations in the state of an inlet stream. As an illustrative example the response of a cross-current heat exchanger to a stepchange in the temperature of one of the inlet streams is calculated.

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