text: Yo, check it out, I'm 'bout to drop some knowledge,
  Talkin' 'bout that Electroosmotic flow, let's acknowledge.
  Widely used in bio microfluidic apps,
  With that viscoelastic non-Newtonian rap.
  
  Numerical investigation, that's the deal,
  Studyin' the flow through a constriction, it's real.
  Microfluidic channel, ten to one in size,
  Connectin' reservoirs, we visualize.
  
  Oldroyd-B model, coupled with Poisson-Boltzmann,
  That's how we model it, gettin' it done.
  Polyacrylamide solution, that's the name,
  PAA concentration and electric field, that's the game.
  
  Steady EOF of Newtonian fluid, that's smooth,
  But PAA solution, it's 'bout to groove.
  When the electric field goes beyond a critical dose,
  Vortices form upstream, that's how it goes.
  
  Viscoelastic fluid, it's a whole new scene,
  Spatially and temporally dependent, you know what I mean.
  Exit velocity higher than the entrance, that's the fact,
  Qualitative agreement, experimental impact.
  
  Same viscosity, but the viscoelastic's slower,
  Time-averaged velocity, it's lower.
  Compared to Newtonian fluid, that's the scoop,
  Now you know the deal, the flow's in the loop.