Numerical simulation of von Karman swirling bioconvection nanofluid flow from a deformable rotating disk

Kadir, A; Mishra, SR; Shamshuddin, M; Beg, OA

Abstract

Rotating disk bio-reactors are fundamental to numerous medical and chemical engineering processes including oxygen transfer, chromatography, purification and swirl-assisted pumping. The modern upsurge in biologically-enhanced engineering devices has embraced new phenomena including bioconvection of microorganisms (photo-tactic, magneto-tactic, oxy-tactic, gyrotactic etc). The proven thermal performance superiority of nanofluids i.e. base fluids doped with engineered nano-particles, has also stimulated immense implementation in biomedical designs. Motivated by these emerging applications, in the current study, we study analytically and computationally the time-dependent 3-dimensional viscous gyrotactic bioconvection in swirling nanofluid flow from a rotating disk configuration. The disk is also deformable i.e. able to extend (stretch) in the radial direction. Stefan blowing is included. The nanofluid is assumed to be dilute and the Buongiorno MIT formulation is adopted wherein Brownian motion and thermophoresis are the dominant nanoscale effects. Semi-numerical solutions are developed for the problem using the efficient Adomian decomposition method (ADM). Validation with earlier Runge-Kutta shooting computations in the literature is also conducted. Extensive computations are presented (with the aid of MATLAB symbolic software) for radial and circumferential velocity components, temperature, nano-particle concentration, micro-organism density number and gradients of these functions at the disk surface (radial local skin friction, local circumferential skin friction, local Nusselt number, local Sherwood number, motile microorganism mass transfer rate). Extensive interpretation of the results is included. The work provides a useful benchmark for further computational fluid dynamics simulations of nano-bioconvection rotating disk reactors.

Citation

Kadir, A., Mishra, S., Shamshuddin, M., & Beg, O. (2018, August). Numerical simulation of von Karman swirling bioconvection nanofluid flow from a deformable rotating disk. Poster presented at ICHTFM 2018 : 20th International Conference on Heat Transfer and Fluid Mechanics, Istanbul, Turkey

• Presentation Conference Type: Poster
• Conference Name: ICHTFM 2018 : 20th International Conference on Heat Transfer and Fluid Mechanics
• Conference Location: Istanbul, Turkey
• Start Date: Aug 16, 2018
• End Date: Aug 17, 2018
• Acceptance Date: Jul 20, 2018
• Deposit Date: Jul 23, 2018
• Publicly Available Date: Aug 18, 2018
• Publisher URL: https://waset.org/conference/2018/08/istanbul/ICHTFM
• Additional Information: Event Type : Conference