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Science & Tech.
Pradeep Kumar

06/06/21 10:50 AM IST

Bose Einstein condensation

In news

An important phenomenon studied in aerospace engineering is the emergence of order from chaos in turbulent systems that leads to detrimental large amplitude fluctuations.

Highlights
  • Examples of this include aeroelastic flutter as observed in the wings of aircraft and thermoacoustic instabilities in rocket combustors, both of which can lead to the breaking down of the system.
  • For this reason, it is important to be able to predict and understand such happenings and avoid them.
  • An oft-quoted example of this is the failure during testing of the F-1 engine in the Apollo rocket.
  • Initially, every time they tested the rocket, the engine would get into this instability and explode.
  • They later introduced baffles that disrupted the interactions between the flames and that between the flames and the combustion chamber giving the engine the desired stability.
Orbit condensation
  • During chaotic movement, there are several possible orbits, and so even as the trajectory moves towards one orbit, it is attracted to a different orbit, and therefore does not stick to any one orbit. However, as the parameter is tuned and the system makes a transition towards order, the number of orbits is reduced and therefore, the trajectory gets caught in a few stable orbits.
  • The researchers label this process a type of “condensation.” “In the current work we have provided a novel perspective to study the transformation of the phase space structure with transition from chaos to order using analogy with Bose-Einstein Condensation.
  • The next step would be to use statistics of Bosons, namely, tools from statistical mechanics that are used to study Boson particles and Bose-Einstein condensation, to quantify the transformations in the topology of the phase space.
Source: The Hindu

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