Figure 5
From: Towards uniformly oriented diatom frustule monolayers: Experimental and theoretical analyses

Theoretical solutions of diatoms rising towards the water’s surface following submersion, as a function of varying initial orientation. (a) A concave-up frustule’s rising trajectory. (b) A concave-down frustule’s rising trajectory. The initial tilt angle (θ(0)) of both frustules is 30°.