A5038754018- Surface Modification and Superhydrophobicity
- Fluid Dynamics and Heat Transfer
- Fluid Dynamics and Thin Films
- Electromagnetic Scattering and Analysis
- Matrix Theory and Algorithms
- Adhesion, Friction, and Surface Interactions
- Electrowetting and Microfluidic Technologies
- Advanced Materials and Mechanics
- Metallurgy and Material Forming
- Heat Transfer and Optimization
- Process Optimization and Integration
- Microfluidic and Capillary Electrophoresis Applications
- nanoparticles nucleation surface interactions
- Numerical methods in engineering
- Advanced Numerical Methods in Computational Mathematics
- Pickering emulsions and particle stabilization
- Aluminum Alloy Microstructure Properties
- Electromagnetic Simulation and Numerical Methods
- Computational Geometry and Mesh Generation
- Metallurgy and Material Science
- Spaceflight effects on biology
- Numerical methods for differential equations
- Membrane Separation Technologies
- Microfluidic and Bio-sensing Technologies
- Innovations in Concrete and Construction Materials
National Technical University of Athens
2008-2019
Athens State University
2018
National Centre of Scientific Research "Demokritos"
2016
A method that computes minimum energy paths (MEPs) of wetting transitions is developed. The couples the Cahn–Hilliard formulation a modified phase-field with simplified string method. Its main computational kernel fast Fourier transform efficiently performed on graphics processing units. effectiveness proposed demonstrated two types droplets grooved surfaces. first transition from Cassie–Baxter state to Wenzel state, where it shown progresses in sequential manner droplet each groove...
Wetting phenomena on hydrophobic surfaces are strongly related to the volume and pressure of gas pockets residing at solid-liquid interface. In this study, we explore underlying mechanisms droplet actuation mobility manipulation when backpressure is applied through a porous medium under sessile pinned droplet. Reversible transitions between initially sticky state slippery states thus incited by modulating backpressure. The sliding angles deionized (DI) water ethanol in DI droplets various...
The Minimum Energy Paths (MEPs) of wetting transitions on pillared surfaces are computed with the Young-Laplace equation, augmented a pressure term that accounts for liquid-solid interactions. interactions smoothed over short range from solid phase, therefore facilitating numerical solution problems concerning complex surface patterns. patterns may include abrupt geometric features, e.g., arrays rectangular pillars, where application unmodified is not practical. MEPs obtained by coupling...
We study the actuation of droplets on porous substrates by air that permeates through pores.
The pattern design of superhydrophobic surfaces can be significantly aided by computations that predict the Cassie-Baxter (CB) to Wenzel (W) transition, which is responsible for break-down behavior. We present a computational framework optimization patterned based on energy barriers CB-W transitions comprises following elements: (a) structured surface patterns, example, arrays pillars, with parameterized geometric features such as size, pitch, slope, and roundness. (b) Computation wetting...
A numerical method for the precise calculation of temperature, velocity and pressure profiles α-β brass indirect hot extrusion process is presented. The solves Navier–Stokes equations non-Newtonian liquids with strain-rate temperature-dependent viscosity that formulated using established constitutive laws based on Zener–Hollomon type equation plastic flow stress. can be implemented standard computational fluid dynamics (CFD) software, has relatively low cost, avoids artifacts associated...
The singularities that arise in elliptic boundary value problems are treated locally by a singular function integral method. This method extracts the leading coefficients from series expansion describes local behavior of singularity. is fitted into framework widely used element (BEM), forming hybrid technique, with BEM computing solution away Results technique reported for Motz problem and compared results standalone Galerkin/finite (GFEM). comparison made terms total flux (i.e. capacitance...
The growing need for creating surfaces with specific wetting properties, such as superhyrdophobic behavior, asks novel methods their efficient design. In this work, a fast computational method the evaluation of patterned is introduced. hydrophobicity surface quantified in energy terms through an objective function. increased cost led to parallelization Message Passing Interface (MPI) communication protocol that enables calculations on distributed memory systems allowing parametric...