Spatiotemporal linear stability of viscoelastic Saffman–Taylor flows

D Bansal, T Chauhan, S Sircar - Physics of Fluids, 2022 - pubs.aip.org
The temporal and spatiotemporal linear stability analyses of a displaced Oldroyd-B fluid with
the mean flow in a horizontally aligned, square, Hele–Shaw cell are reported to identify the …

Rheodynamics of viscoelastic subdiffusive channel flows: Low Weissenberg number regime

T Chauhan, M Bhatt, S Shrivastava, P Shukla… - Physics of …, 2023 - pubs.aip.org
Direct numerical simulations of viscoelastic, subdiffusive, and plane Poiseuille flow,
representing thick polymer solutions including polymer melts, flows of liquid crystals, as well …

Spatiotemporal linear stability of viscoelastic free shear flows: Nonaffine response regime

D Bansal, D Ghosh, S Sircar - Physics of Fluids, 2021 - pubs.aip.org
We provide a detailed comparison of the two-dimensional, temporal, and spatiotemporal
linearized analyses of the viscoelastic free shear flows (inhomogeneous flows with mean …

Spatiotemporal linear stability of viscoelastic free shear flows: Dilute regime

S Sircar, D Bansal - Physics of Fluids, 2019 - pubs.aip.org
We report the temporal and spatiotemporal stability analyses of antisymmetric, free shear,
viscoelastic flows obeying the Oldroyd-B constitutive equation in the limit of low to moderate …

Implicit-explicit-compact methods for advection diffusion reaction equations

S Singh, D Bansal, G Kaur, S Sircar - Computers & Fluids, 2020 - Elsevier
We provide a comparison of the dispersion properties, specifically the time-amplification
factor, the scaled group velocity, the error in the phase speed and scaled numerical diffusion …

Spatiotemporal linear stability of viscoelastic subdiffusive channel flows: a fractional calculus framework

T Chauhan, D Bansal, S Sircar - Journal of Engineering Mathematics, 2023 - Springer
The temporal and spatiotemporal linear stability analyses of viscoelastic, subdiffusive, plane
Poiseuille flow obeying the Fractional Upper Convected Maxwell (FUCM) equation in the …

Quantifying macrostructures in viscoelastic sub-diffusive flows

T Chauhan, K Kalyanaraman, S Sircar - Journal of Mathematical …, 2024 - pubs.aip.org
We present a theory to quantify the formation of spatiotemporal macrostructures (or the non-
homogeneous regions of high viscosity at moderate to high fluid inertia) for viscoelastic sub …

Elastoinertial stability analysis and structure formation in viscoelastic subdiffusive pipe flow

M Bhatt, T Chauhan, R Agrawal, M Kumar, V Kumar… - Physics of …, 2024 - pubs.aip.org
The modal temporal stability analysis of viscoelastic, subdiffusive, pressure driven,
axisymmetric pipe flow, representing thick polymer solutions, exhibits the presence of …

Ion mediated crosslink driven mucous swelling kinetics

S Sircar, AJ Roberts - arXiv preprint arXiv:1501.05003, 2015 - arxiv.org
We present an experimentally guided, multi-phasic, multi-species ionic gel model to
compare and make qualitative predictions on the rheology of mucus of healthy individuals …

Implicit-explicit time integration method for fractional advection-reaction-diffusion equations

D Ghosh, T Chauhan, S Sircar - arXiv preprint arXiv:2301.06507, 2023 - arxiv.org
We propose a novel family of asymptotically stable, implicit-explicit, adaptive, time
integration method (denoted with the $\theta $-method) for the solution of the fractional …