Development Of A Multi-Grid Fdtd Code For Three-Dimensional Simulation Of Large Microwave Sintering Experiments

1996 ◽  
Vol 430 ◽  
Author(s):  
Mikel J White ◽  
Magdy F. Iskander ◽  
Hal D. Kimrey
Keyword(s):  
Microwave Sintering ◽  
Three Dimensional ◽  
Uniform Grid ◽  
Computer Memory ◽  
University Of Utah ◽  
Grid Codes ◽  
Dimensional Simulation ◽  
The University ◽  
Computer Resources ◽  
Difference Time

AbstractThe Finite-Difference Time-Domain (FDTD) code available at the University of Utah has been used to simulate sintering of ceramics in single and multimode cavities, and many useful results have been reported in literature [1–4]. More detailed and accurate results, specifically around and including the ceramic sample, are often desired to help evaluate the adequacy of the heating procedure. In electrically large multimode cavities, however, computer memory requirements limit the number of the mathematical cells, and the desired resolution is impractical to achieve due to limited computer resources. Therefore, an FDTD algorithm which incorporates multiple-grid regions with variable-grid sizes is required to adequately perform the desired simulations. In this paper we describe the development of a three-dimensional multi-grid FDTD code to help focus a large number of cells around the desired region. Test geometries were solved using a uniform-grid and the developed multi-grid code to help validate the results from the developed code. Results from these comparisons, as well as the results of comparisons between the developed FDTD code and other available variable-grid codes are presented. In addition, results from the simulation of realistic microwave sintering experiments showed improved resolution in critical sites inside the three-dimensional sintering cavity. With the validation of the FDTD code, simulations were performed for electrically large, multimode, microwave sintering cavities to fully demonstrate the advantages of the developed multi-grid FDTD code.

MPF-FDTD Simulations of Fabrication and Optical Analysis of Ordered Gold Nano-Dots Array

2012 ◽  
Vol 523-524 ◽  
pp. 621-626
Author(s):  
Akinori Yamanaka ◽  
Zhen Xing Li ◽  
Masahiko Yoshino
Keyword(s):  
Three Dimensional ◽  
Field Method ◽  
Phase Field Method ◽  
Localized Surface Plasmon ◽  
Optical Analysis ◽  
Optical Responses ◽  
Plastic Forming ◽  
Dimensional Simulation ◽  
Multi Phase ◽  
Difference Time

Recently, the authors have proposed a hybrid fabrication method of an ordered gold nano-dots array using a combination of the nano plastic forming and thermal annealing. In this study, in order to investigate morphology and optical properties of the gold nano-dots array fabricated by the proposed method, we develop a coupled three-dimensional simulation model by using the multi-phase-field method and the finite-difference-time-domain method. The simulation results demonstrate that the ordered gold nano-dots array which can be obtained by the proposed method exhibits quite characteristic optical responses due to the localized surface plasmon resonance.

FDTD Simulation of an Open-Ended Metallized Ceramic Probe for Broadband High-Temperature Dielectric Properties Measurements

1994 ◽  
Vol 347 ◽  
Author(s):  
Shane Bringhurst ◽  
Magdy F. Iskander ◽  
Paul Gartside
Keyword(s):  
High Temperature ◽  
Dielectric Properties ◽  
Microwave Sintering ◽  
Fdtd Method ◽  
Fdtd Simulation ◽  
Minimum Thickness ◽  
University Of Utah ◽  
Coaxial Probes ◽  
On Line ◽  
The University

ABSTRACTOpen-ended coaxial probes have been used in broadband dielectric properties measurements for several years. To aid in the ongoing numerical simulation and microwave sintering research at the University of Utah, we have found it necessary to make dielectric properties measurements up to temperatures as high as 1400 °C. The available cavity perturbation techniques were unsuitable in this application due to their relatively narrow band, and the available metal probes are also unsuitable due to the differential thermal expansions of the inner and outer conductors, which makes it difficult to carry out accurate and on-line calibration procedures for these probes.To help us achieve both broadband and high-temperature dielectric properties measurements, we have developed a new metallized ceramic coaxial probe. The detailed design of this probe is described and the metallization procedure is discussed.Also to optimize the design of the probe and in particular to increase the penetration of fields in samples under test and hence improve the probe sensitivity to variation in properties of a larger class of materials, and to determine the required minimum thickness of various samples to obtain accurate results, we modeled and simulated the probe performance using the Finite-Difference Time-Domain (FDTD) method. Results from the FDTD simulation are presented and some guidelines that may be used to optimize the design of the probe are discussed.

Three-Dimensional Simulation of Planar Solid Oxide Fuel Cell Stack

2008 ◽  
Vol 128 (2) ◽  
pp. 459-466 ◽  
Author(s):  
Yoshitaka Inui ◽  
Tadashi Tanaka ◽  
Tomoyoshi Kanno
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Three Dimensional ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Cell Stack ◽  
Dimensional Simulation

THREE-DIMENSIONAL SIMULATION OF EFFERVESCENT ATOMIZATION SPRAY

2009 ◽  
Vol 19 (1) ◽  
pp. 75-90 ◽  
Author(s):  
Hong-Bing Xiong ◽  
Jian-Zhong Lin ◽  
Ze-Fei Zhu
Keyword(s):  
Three Dimensional ◽  
Atomization Spray ◽  
Dimensional Simulation
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