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Our group carries out research in area of soft and biological matter. Theoretical hydrodynamic description for micron scale systems and also the statistical mechanics of bio-polymers are our main interests. Some of our current projects include the hydrodynamics of low Reynolds motility, sensing strategies at cellular scale, the physics of chemotaxis and statistical mechanics of confined polymers.

Very recently we have started to develop a laboratory for studying the rheology of real fluids. It is still in the elementary steps.

Another Abstract Image Another Abstract Image

Another Abstract Image

(up-left) A geometric model that simulates the hydrodynamical effects in the motion of a bacterium with a single flagellum. Regulating the stochastic jumps of the flagellum in response to local concentration of an stimuli will eventually lead the system to find the source of the stimuli. (up-right) Three-sphere swimmer with a prescribed and non-reciprocal deformation pattern. This system capture the most general features of a low Reynolds propeller. (down) Studying the dynamics of a microtubule that is under the action of compression and perpendicular forces reveals the Euler's buckling threshold for the system. Thermal fluctuations enhances the critical buckling force.


  • An animation showing the motion of a quadrupole swimmer, [300KB].
  • Chemotactic trajectory of a 2-D microhunter, [600KB].
  • 3D trajectory of a single tail bacterium, created by B. Eskandaroin, [1.5MB].
  • Buckling instability for a charged microtubule, created by Kh. Ghamari, [2.5MB].
  • Collective motion of an ensemble of interacting self propelled particles, created by F. Khalili, [3.5MB].
  • A movie showing recoiling fluid filament, recorded by R. Karami at Dr. Habibi's Lab, [9.6MB].


  • Mehrana Reisian-Nejad(PhD Student): Chemotaxis in active and interacting suspensions.
  • Mohammad Reza Ataei(PhD Student): Active Janus particles, possible mechanisms for controlling.
  • Shima Nezamipour(PhD Student): Squirmer in bounded geometry.
  • Amir Jebreilzadeh(PhD Student): Effective viscosity enhanced by run and tumble mechanism.
  • Maryam Sotudeh(PhD Student): Biofilms.