Optimization of non-woven spacers by CFD and validation by experiments

CFD simulations were used to determine mass transfer coefficients and power consumptions in channels filled with non-woven net spacers. The geometric parameters of a non-woven spacer were found to have a great influence on the performance of a spacer in terms of mass transfer enhancement and power consumption. The results from CFD simulations indicate that an optimal spacer geometry exists. Mass transfer coefficients and power consumptions were determined experimentally by the limiting current method and pressure drop measurements. Close agreement between experiments and simulations was observed.

The optimal geometry of non-woven net spacers was determined by CFD simulation. The geometric parameters l/h, α and β have significant influence on spacer performance in terms of mass transfer enhancement and energy consumption. The results from CFD simulations of spacer-filled channels have been successfully validated with experiments in the measuring cell. CFD proves to be a reliable tool for design and optimization of spacers.