This can improve our understanding of animal–fluid interactions at small spatial scales and low Reynolds number.
Particle image velocimetry (PIV) has become an important and widely used tool in biological research involving fluid motion.
This technique has led to a significant increase in our understanding of how animals operating under inertial fluid regimes (high Reynolds number), utilize fluids for locomotion (Tytell and Lauder, 2004; Epps and Techet, 2007; Jiang and Kiørboe, 2011), feeding (Higham ., 2011).
However, our understanding of basic processes, such as feeding and swimming of small organisms operating under primarily viscous conditions (low Re), remains limited.
In addition, most µPIV systems still rely on expensive diode-pumped solid state or Nd: YAG lasers and often require a controller to synchronize pulses with a high-resolution camera's frame capture.Cells were maintained alive due to the natural ability of live cells to avoid adhesion and clumping.While both species are flagellated and motile, the swimming speeds of the algae (few μm s).However, this can also impede the ability to resolve details of body and appendage locations.Therefore, both methods are limited by their ability to resolve flows near body surfaces which can make the relationship between kinematic motion and fluid characteristics difficult to measure.