Search results for " finite element method."

showing 3 items of 53 documents

Multi-physical modelling of reverse electrodialysis

2017

Abstract Reverse electrodialysis (RED) is an electrochemical membrane process that directly converts the energy associated with the concentration difference between two salt solutions into electrical energy by means of a selective controlled mixing. The physics of RED involves the interaction of several phenomena of different nature and space-time scales. Therefore, mathematical modelling and numerical simulation tools are crucial for performance prediction. In this work, a multi-physical modelling approach for the simulation of RED units was developed. A periodic portion of a single cell pair was simulated in two dimensions. Fluid dynamics was simulated by the Navier-Stokes and continuity …

Work (thermodynamics)EngineeringSettore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciSettore ING-IND/25 - Impianti ChimiciGeneral Chemical EngineeringAnalytical chemistry02 engineering and technology020401 chemical engineeringStack (abstract data type)Reversed electrodialysisFluid dynamicsPerformance predictionGeneral Materials Science0204 chemical engineeringSettore ING-IND/19 - Impianti NucleariWater Science and TechnologyComputer simulationPlane (geometry)business.industryMechanical EngineeringGeneral ChemistryMechanics021001 nanoscience & nanotechnology6. Clean waterMembraneReverse electrodialysis multi-physical model finite element method power density profiled membranesSettore ING-IND/06 - Fluidodinamica0210 nano-technologybusiness
researchProduct

Investigations on the linear friction welding process through numerical simulations and experiments

2012

Abstract Linear Friction Welding (LFW) is a solid-state joining process applied to non-axisymmetric components. LFW involves joining of materials through the relative motion of two components undergoing an axial force. In such process the heat source is given by the frictional forces work decaying into heat determining a local softening of the material and eventually bonding conditions. In the paper the authors present a designed and assembled laboratory fixture for LFW operations and the results of an experimental and numerical campaign aimed to weld steel parts. The dedicated fixture permitted to highlight the effect of the most important process parameters. Process conditions allowing ef…

Work (thermodynamics)Materials scienceProcess (computing)Mechanical engineeringWeldingFixtureWelding Friction Solid state bonding Finite element method (FEM)law.inventionProcess conditionslawFriction weldingAxial forceSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneSofteningMaterials & Design
researchProduct

Guided Wave Techniques for Damage Detection in Composite Aerospace Structures

2018

Composite materials make up an increasing portion of today’s aerospace structures (see, e.g. Boeing 787 and Airbus 380). These aircrafts’ fuselage, for example, is composed of a laminated composite skin connected to composite stringers and C-frames. Of primary importance is the detection of damage in these built-up structures, whether caused by the manufacturing process or in service (e.g. impacts). A related issue is the characterization of the composite (visco)elastic mechanical properties, that can also be related to the quantification of potential damage. Guided elastic waves propagating in the ~100s kHz regime lend themselves to provide the necessary sensitivity to these two conditions…

guided waves dispersion damage detection composites anisotropy semi-analytical finite element method air-coupled ultrasonic testingSettore ICAR/08 - Scienza Delle Costruzioni
researchProduct