title: Steric effect and slip-modulated energy transfer in narrow fluidic channels with finite aspect ratios.
abstract: In this study, we delineate the combined consequences of finite channel aspect ratios, wall slip effects and steric interactions on the energy transfer mechanisms in narrow fluidic confinements. By considering the details of ionic interactions within the electrical double layer, we demonstrate that considerations of finite aspect ratios and steric effects may result in dramatic alterations in the predictions of effective viscosity as well as the energy transfer efficiency, particularly for high magnitudes of the surface charge density, as compared with the predictions based on parallel plate channel considerations. We also illustrate the possibilities of obtaining very high energy transfer efficiencies by employing channels of aspect ratios close to unity, with a judicious exploitation of steric interactions and wall slippage effects in highly confined geometries.
authors.affiliation: Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, India.
authors.forename: Anirban
authors.initials: A
authors.lastname: Garai
authors.forename: Suman
authors.initials: S
authors.lastname: Chakraborty
mesh_terms: D000465:Algorithms; D004563:Electrochemistry; D046210:Microfluidic Analytical Techniques / Q000379:methods*; D008956:Models, Chemical; D008968:Molecular Conformation; D014783:Viscosity