what is a plunger, waves?
<answer> A plunger type wave maker is made of a solid submerged body which oscillates vertically into water surface. <context> paddle, and plunger types. A plunger type wave maker is made of a solid submerged body which oscillates vertically into water surface. This vertical motion causes water displacement which in turn generates waves. The plunger cross section could be in different shapes. However, the most general shape is cylindrical or triangular ones [2].