On Numerical Simulation of Electrochemical Processes in Thin Layer Cells

2020 ◽  
Author(s):  
José L. Bott-Neto ◽  
Marta V.F. Rodrigues ◽  
Mariana C. Silva ◽  
Evaldo Batista Carneiro Neto ◽  
Gabriel Wosiak ◽  
...  

<p><b>Abstract:</b> (Photo)electrochemical processes are involved in many fields of science and technology. The use of spectroscopic techniques coupled to (photo)electrochemistry, are mandatory to get information about interfacial processes on scale ranges from millimeters to the nanoscale. The development of spectroelectrochemical cells (SEC) contribute to the progress of the field of (photo)electrochemistry and its impact in science and technology. Therefore, in this work, we describe in detail the development of a versatile SEC that can be used for several <i>in situ</i> techniques. We performed electrochemical and computational experiments to analyze the response of our SEC as a function of the working electrode size, position and distance to the window. We found that our SEC behaves as the conventional cell when the electrode is far from the window. However, important differences arise in the thin layer configuration. The computational experiments suggest that to mitigate these problems, it is important to perform <i>in situ</i> experiments in the thin layer configuration using electrodes as small as possible.</p>


2019 ◽  
Vol 13 (16) ◽  
pp. 33-43
Author(s):  
Debamoy Sen ◽  
K M Isaac ◽  
Nicholas Leventis

2015 ◽  
Vol 799-800 ◽  
pp. 651-655
Author(s):  
Jun Ting Yin ◽  
Gang Li

In conventional charge structure, the shell of charge’s containment is normally closed, with no explosive. When initiating charge, shell expanding to the outward, rupturing and eventually spreading out which was driven by the charge, this don’ have a guiding role to the detonation product flow. To further enhance the control of charge’s detonation product and energy flow, realizing the effective use of detonation products. The thesis put forward a structure design of filling thin-layer explosive in multi-layer shell, by initiating thin-layer explosive to control the deformation of shell, obtaining a approximately function with Laval Nozzle structure which can control the gas product when charge detonation. The thesis put forward a structure that including multi-layer explosive shell, establishing a numerical simulation model. Analysis the difference of shell’ deformation on different initiation method, provides a design references for further engineering application.


2012 ◽  
Vol 18 (2) ◽  
pp. 245-252 ◽  
Author(s):  
Jamaloddin Noorzaei ◽  
Parviz Moradi Pour ◽  
Mohamed Saleh Jaafar ◽  
Yong Chooi Fong ◽  
Waleed Abdul-Malik Thanoon

The present study deals with two dimensional, numerical simulation of railway track supporting system subjected to dynamic excitation force. Under plane strain condition, the coupled finite-infinite elements to represent the near and far field stress distribution and thin layer interface element was employed to model the interfacial behavior between sleepers and ballast. To account for the relative debonding, slipping and crushing that could take place in the contact area between the sleepers and ballast, modified Mohr-Coulomb criterion was adopted. Furthermore an attempt has been made to consider the elasto-plastic material non-linearity of the railway track supporting media by employing different constitutive models to represent steel, concrete and supporting materials. Based on the proposed physical and constitutive modeling a code has been developed for dynamic loads. The applicability of the developed F.E code has been demonstrated by analyzing a real railway supporting structure. Santrauka Šiame straipsnyje nagrinėjama geležinkelio bėgių dvimatė sistema, veikiama dinaminės žadinančios jėgos. Pagal plokštuminę deformacijų sąlygą suporuoti baigtiniai begaliniai elementai aprašo artimą ir tolimą įtempių pasiskirstymo sritis, o plonasienis sąsajos elementas yra įvestas sąveikai tarp pabėgių ir balasto aprašyti. Yra naudojamas modifikuotas Mohr-Coulombo kriterijus, kuris įvertina atplėšimo, nuslydimo ar išspaudimo galimybes kontaktiniame pabėgių ir balasto paviršiuje. Taip pat yra pabandyta įvertinti tampriai plastinės medžiagos netiesiškumą, sudarant skirtingus sudėtinius sistemos modelius (pavyzdžiui, iš plieno, betono, atramų medžiagų). Remiantis pasiūlytu fiziniu ir sudėtiniu modeliavimu sudarytas skaičiavimo algoritmas dinaminėms apkrovoms įvertinti. Sudaryto baigtinių elementų algoritmo pritaikymas yra pademonstruotas išnagrinėjus realią geležinkelio bėgių sistemą.


2008 ◽  
Vol 13 (2) ◽  
pp. 191-199 ◽  
Author(s):  
O. V. Klymenko ◽  
J. Kulys

A model of spectroelectrochemical cell design based on a tubular working electrode with optical fibers connected to a spectrometer entering it from two ends is built. Both current and absorbance responses of the cell are numerically simulated and the operation regimes are determined in terms of ranges of governing parameters for chronoamperometry and linear sweep voltammetry.


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