Effect of chain scission on flow characteristics of wormlike micellar solutions past a confined microfluidic cylinder: a numerical analysis

Abstract

Elastic instability and elastic wave phenomena can be seen for the flow of a wormlike micellar solution past a confined microfluidic cylinder once the Weissenberg number exceeds a critical value.

Unsteady motion past a sphere translating steadily in wormlike micellar solutions: a numerical analysis

“…For different viscometric flows, a very good agreement has been found between the predictions obtained with the VCM model and the corresponding experimental results (Pipe et al 2010;Mohammadigoushki et al 2019) whereas for a non-viscometric complex flow, a good qualitative correspondence has been seen in recent studies (Kalb, Villasmil U. & Cromer 2017Khan & Sasmal 2020;Sasmal 2020). Therefore, this VCM model's capability of predicting the flow behaviour of WLM solutions in various flow fields is well established.…”

“…In particular, the recently developed rheoFoam solver available in rheoTool (Pimenta & Alves 2016) has been used in the present study. A detailed discussion of the present numerical set-up and its validation has been presented in our recent studies (Khan & Sasmal 2020;Sasmal 2020), and hence it is not repeated here. The following boundary conditions were employed in order to solve the present problem.…”

Bifurcations in flows of complex fluids around microfluidic cylinders

“…Furthermore, at least over the range of Wi for which the flow remains steady, viscoelastic flow around a cylinder can be modelled in 2D, making the problem much more amenable to numerical simulation than the 3D flow around a sphere. For these reasons, viscoelastic flow around a circular cylinder confined in a channel is a widely studied problem both experimentally 23,[77][78][79][80][81][82][83][84][85][86][87] and numerically, 24,82,[88][89][90][91][92] and has become a common test for confirming the accuracy of viscoelastic flow simulations. 22 A detailed recent review of the literature on viscoelastic flows around cylinders is contained in ref.…”

Flow dynamics of wormlike micellar solutions through a model porous media

“…The significance of this parameter is that as its value decreases, the amount of stress needed to break a micelle increases. The values of the VCM model parameters chosen for the present study are as follows 36,49 :…”

“…All the simulations were run in a parallel fashion with MPI (Message Passing Interface) interface facility available in OpenFOAM wherein each simulation was distributed among 8 to 12 CPU cores, each having 2 GB RAM. A detailed validation of the present numerical setup has already been presented in our earlier studies 39,49,55 , and hence it is not again performed here.…”