Modelling and Analysis of Viscoelastic and Nanofluid Effects on the Heat Transfer Characteristics in a Double-Pipe Counter-Flow Heat Exchanger

This study computationally investigates the heat transfer characteristics in a double-pipe counter-flow heat-exchanger. A heated viscoelastic fluid occupies inner core region, and outer annulus is filled with colder Newtonian-Fluid-Based Nanofluid (NFBN). mathematical model developed to conjugate exchange properties from hot NFBN. The modelling formulation of given problem comprises system coupled nonlinear partial differential Equations (PDEs) governing flow, transfer, stress characteristics. behaviour modelled via Giesekus constitutive equations. complexity arising transient PDEs makes them analytically intractable, hence, recourse numerical computational methodologies unavoidable. methodology based on finite volume methods (FVM) employed. FVM algorithms are implemented OpenFOAM software platform. dependence field variables, namely velocity, temperature, pressure, polymeric stresses embedded flow parameters, explored detail. In particular, results illustrate that an increase nanoparticle volume-fraction, NFBN, leads enhanced heat-exchange shell Specifically, use NFBN as coolant cooling core-fluid compared using ordinary (nanoparticle free) Newtonian coolant.