Accessing the role of Joule heating on densification during flash sintering of YSZ

2022 ◽  
Vol 211 ◽  
pp. 114508
Author(s):  
Subhadip Bhandari ◽  
Tarini Prasad Mishra ◽  
Olivier Guillon ◽  
Devinder Yadav ◽  
Martin Bram
2013 ◽  
Vol 11 (2) ◽  
pp. 815-823 ◽  
Author(s):  
Mario A. Oyanader ◽  
Pedro E. Arce ◽  
James D. Bolden

Abstract An analysis for boundary layer flows caused by natural convection due to heat generation caused by the Joule heating effect is presented. The integral approximation approach developed by Von Karman is used to model the boundary layer flow in the system. Effects of the heat generation on temperature and velocity profiles as well as on the boundary layer thickness are discussed, and their implication for possible convective mixing effects near the electrode region is highlighted. These are important pieces of information when designing applications in electrokinetic remediation and separation of biomolecules.


2013 ◽  
Vol 11 (2) ◽  
pp. 687-699
Author(s):  
Mario A. Oyanader ◽  
Pedro E. Arce

Abstract This contribution focuses on the analysis of the hydrodynamics taking place near an electrode of cylindrical geometry in electrokinetic applications. Both the temperature development conditions and Joule heating effect are included. A boundary layer approach has been used to model the hydrodynamic in the system. This is based on the heat transfer model, the continuity equation, and the Navier–Stokes equation. The resulting set of two partial differential equations mutually coupled is solved applying the Von Karman integral approximation. A numerical solution of the differential–integral model is used to illustrate the behavior of the systems under a variety of conditions.


Environments ◽  
2018 ◽  
Vol 5 (8) ◽  
pp. 92
Author(s):  
Cynthia M. Torres ◽  
Pedro E. Arce ◽  
Francisca J. Justel ◽  
Leonardo Romero ◽  
Yousef Ghorbani

Electrokinetic remediation is a process in which a low-voltage direct-current electric field is applied across a section of contaminated soil to remove contaminants. In this work, the effect of Joule heating on the heat transfer and hydrodynamics aspects in a non-uniform environment is simulated. The proposed model is based on a rectangular capillary with non-symmetrical heat transfer conditions similar to those found in non-uniform soil environments. The mathematical and microscopic model described here uses two key parameters in addition to the Nusselt number: the ratio between the Nusselt numbers calculated at both walls of the capillary, named R, and a function of this variable and the Nusselt number, indicated by F(R, Nu). Illustrations describing the five key regimens for the system behavior are presented in terms of ranges for R and F(R, Nu) values, which indicate the key role of the parameter R in controlling the behaviors of the temperature and velocity profiles. Prediction, analysis, and illustration of five different regimes of flow complete the study, and conclusions are given to illustrate how the behavior of the system is affected.


2013 ◽  
Vol 103 (6) ◽  
pp. 061902 ◽  
Author(s):  
Bongjin Simon Mun ◽  
Joonseok Yoon ◽  
Sung-Kwan Mo ◽  
Kai Chen ◽  
Nobumichi Tamura ◽  
...  

2006 ◽  
Vol 99 (11) ◽  
pp. 114316 ◽  
Author(s):  
M. L. Trouwborst ◽  
S. J. van der Molen ◽  
B. J. van Wees
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document