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In CFD modelling, relaxation methods are widely used in numerical wave tanks (NWTs) for wave absorption; however, this method can be very expensive as part of the NWT must be dedicated to a relaxation zone. In this short technical note, a parametric study on the effects of the relaxation approach on absorbing different types of waves is reported. In addition, a simple modification to the relaxation method is suggested. The results appear to show that the modified relaxation approach helps to reduce the length of the relaxation zone by nearly half whilst retaining good performance in terms of wave absorption.
Original languageEnglish
Article number106210
JournalOcean Engineering
Early online date12 Jul 2019
Publication statusPublished - 1 Sep 2019

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