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Updated: Oct 31, 2025
08:17
An Additive Manufacturing Technique for the Facile and Rapid Fabrication of Hydrogel-based Micromachines with Magnetically Responsive Components
Published on: July 18, 2018
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Exploring the nanomechanical concepts of development through recent updates in magnetically guided system
Noor Saeed Khan1,2,3, Auwalu Hamisu Usman4,5, Attapol Kaewkhao6
1KMUTTFixed Point Research Laboratory, Room SCL 802 Fixed Point Laboratory, Science Laboratory Building, Department of Mathematics, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, 10140, Thailand. noorsaeedkhankhattak@gmail.com.
Scientific Reports
|July 1, 2021
Summary
This study analyzes unsteady mixed bioconvection in a rotating nanofluid. Key findings reveal how parameters like rotation and buoyancy affect fluid flow, temperature, nanoparticle concentration, and microorganism density.
Area of Science:
- Thermodynamics
- Fluid Dynamics
- Nanotechnology
- Bioconvection
Background:
- Nanofluids offer enhanced thermal properties, crucial for heat transfer applications.
- Bioconvection, driven by motile microorganisms, influences fluid dynamics and heat transport.
- Understanding these phenomena in rotating systems is vital for advanced engineering.
Purpose of the Study:
- To analytically investigate unsteady mixed bioconvection in a rotating nanofluid.
- To examine the impact of Brownian motion, thermophoresis, and magnetic dipole effects.
- To analyze the influence of various dimensionless parameters on flow, temperature, and concentration fields.
Main Methods:
- Formulation of governing partial differential equations for thermodynamics and microorganism motion.
- Transformation of PDEs into dimensionless ordinary differential equations.
- Application of the homotopy analysis method for analytical solutions.
Main Results:
- Primary velocity is influenced by mixed convection, viscoelasticity, buoyancy ratio, magnetic interactions, and rotation.
- Secondary velocity shows sensitivity to viscoelasticity and rotation.
- Temperature decreases with increased Prandtl number and thermophoresis; nanoparticle concentration rises with Brownian motion.
- Motile microorganism density increases with bioconvection Rayleigh number, rotation, and thermal Biot number.
Conclusions:
- The study provides a comprehensive analytical framework for unsteady bioconvection in rotating nanofluids.
- Dimensionless parameters significantly alter fluid behavior, thermal profiles, nanoparticle distribution, and microorganism dynamics.
- Results offer insights into optimizing heat and mass transfer in complex fluid systems.
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