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Deprecated: Implicit conversion from float 217.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Phys+Rev+E+Stat+Nonlin+Soft+Matter+Phys 2014 ; 90 (4): 042304 Nephropedia Template TP
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Phase separation and emergent structures in an active nematic fluid #MMPMID25375491
Putzig E; Baskaran A
Phys Rev E Stat Nonlin Soft Matter Phys 2014[Oct]; 90 (4): 042304 PMID25375491show ga
We consider a phenomenological continuum theory for an active nematic fluid and show that there exists a universal, model independent instability which renders the homogeneous nematic state unstable to order fluctuations. Using numerical and analytic tools we show that, in the vicinity of a critical point, this instability leads to a phase separated state in which the ordered regions form bands in which the direction of nematic order is perpendicular to the direction of density gradient. We argue that the underlying mechanism that leads to this phase separation is a universal feature of active fluids of different symmetries.