Novel perturbations between magnetic nanofluid and the thermal fluidic system at heat dissipation

The thermal fluidic system (TFS), a type of two-phase device, has recently attracted significant attention in mechatronic system cooling. The aim of this study is to use magnetic nanofluid (MNF) with magneto-hydrodynamics (MHD) to enhance the thermal performance of a miniature TFS. The MNF used for the primary working fluid (WF) can be prepared from fine ferromagnetic particles of iron ferrite using a chemical co-precipitation technique. Based on the design of local electromagnetic fields, a transient Lorentz force can be induced within the MNF-based channel flow and thermal convection in MNF can then be actively enhanced. In this study of a novel TFS, the highest thermal performance showed a 41.82 ± 0.01% enhancement. This study not only shows an effective technique for identifying TFS dynamics, but also provides valuable suggestions for cooling system designs using regular heat transportation.

Representation of flow characteristics (a) within and (b) around the ends of electromagnets in a MHD channel flow.Figure optionsDownload as PowerPoint slideHighlights
► The magnetic nanofluid can be used to enhance the thermal performance of a miniature thermal fluidic system.
► The enhancement of thermal performance can reach 41.82%.
► An effective way is used for identifying TFS dynamics.