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White paper

CFD investigation of ALS technique on frictional drag reduction

Increasing fuel costs and looming emissions restrictions are driving shipowners to reduce ship resistance and reduce installed power. One method to reduce ship frictional drag is air lubrication systems (ALS), a method of injecting air bubbles below the hull.

This white paper details a study on 3D numerical investigations into frictional drag reduction. The authors investigate how multiphysics CFD can be used to study air lubrication and aid in the understanding of ship efficiency.


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Multphysics CFD models simulate complex hydrodynamics problems, which cannot be accurately modeled in a towing tank. This numerical approach gives additional insight into vessel performance before any physical testing is performed.