Original sentence: An edge wave is a surface wave fixed by refraction against a rigid boundary, often a shoaling beach.Progressive edge waves travel along this boundary, varying sinusoidally along it and diminishing exponentially in the normal
Edited sentence: In fluid dynamics, an edge wave is a surface gravity wave fixed by refraction against a rigid boundary, often a shoaling beach.Progressive edge waves travel along this boundary, varying sinusoidally along it and diminishing exponentially in the offshore direction