How Fish swim?
- February 27, 2022
- Posted by: OptimizeIAS Team
- Category: DPN Topics
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How Fish swim?
TOPIC: Science & Tech
Context- In a new study, researchers at the Harbin Engineering University in China have unravelled the mechanism that drives the fish forward while swimming.
Concept-
- Through precise control of body fluctuations, pressure fields are created in the form of movable vortex pairs of high and low pressure regions that enable them to swim.
- This can be explained by physics of fluids
- A fish accelerates when it bends its caudal fin — attached to the vertebral column — to one side and then returns to the neutral position as the fish straightens its body.
- This causes the formation of two vortex cores with low pressure and high pressure regions on opposite sides of the fish.
- The caudal fin used the low pressure area to drive the fluid toward the body and generate a vertical upward pull on the fin.
- The high pressure area pushed the fluid away at the crest and generated an upward thrust on the caudal fin.
- Repetition of this process enabled the fish to move continuously.