Coupled Electromagnetic-Thermodynamic Simulations of Microwave Heating Problems Using the FDTD Algorithm

2006 ◽  
Vol 41 (4) ◽  
pp. 18-29 ◽  
Author(s):  
Pawet Kopyt ◽  
Malgorzata Celuch
Keyword(s):  
Microwave Heating ◽  
Thermodynamic Simulations

scholarly journals Local microwave heating of sand molds as a means to overcome design limitations in sand mold casting

2014 ◽  
Vol 12 ◽  
pp. 21-28 ◽  
Author(s):  
O. Wiedenmann ◽  
R. Ramakrishnan ◽  
P. Saal ◽  
E. Kılıç ◽  
U. Siart ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Microwave Heating ◽  
Casting Process ◽  
Sand Mold ◽  
Metal Casting ◽  
Temperature Dependent ◽  
Selective Heating ◽  
Thermodynamic Simulations ◽  
Mold Casting ◽  
Absorbing Materials

Abstract. Microwave induced selective heating outmatches conventional mold heating by convective heat transfer in means of energy efficiency and cycle time. Moreover, it provides the opportunity of a local manipulation of solidification and cooling processes within the sand casting mold. In this paper, we investigate the suitability of different highly absorbing materials to indirectly heat up the mostly microwave transparent sand mold. The temperature-dependent permittivity of the involved materials is determined by resonator experiments and subsequently used to simulate the electromagnetic field and the thermodynamic response of the sand mold prior to a metal casting process. Experimental results are presented and compared with the outcome of the coupled electromagnetic-thermodynamic simulations and the influence of local microwave heating on the solidification and cooling of the cast is studied.

Drying of moisture packed beds due to microwave heating using a rectangular waveguide

2002 ◽  
Author(s):  
Kazuo Aoki ◽  
Phadungsak Ratanadecho ◽  
Takashi Mikawa ◽  
Masatoshi Akahori
Keyword(s):  
Microwave Heating ◽  
Rectangular Waveguide ◽  
Packed Beds

Detection and characterisation of buried objects using infrared thermography enhanced by microwave heating

2002 ◽  
Author(s):  
Arnaud Jacotin ◽  
Elodie Bachelier ◽  
Francois Liousse ◽  
Pierre Millan
Keyword(s):  
Microwave Heating ◽  
Infrared Thermography ◽  
Buried Objects

Usefulness of Foundry Tooling Materials in Microwave Heating Process

2013 ◽  
Vol 58 (3) ◽  
pp. 919-922 ◽  
Author(s):  
K. Granat ◽  
B. Opyd ◽  
D. Nowak ◽  
M. Stachowicz ◽  
G. Jaworski
Keyword(s):  
Electromagnetic Field ◽  
Microwave Heating ◽  
Loss Factor ◽  
Perturbation Technique ◽  
Resonant Cavity ◽  
Precise Determination ◽  
Heating Process ◽  
Basic Criterion ◽  
Measurement Results ◽  
Heating Technology

Abstract The paper describes preliminary examinations on establishing usefulness criteria of foundry tooling materials in the microwave heating technology. Presented are measurement results of permittivity and loss tangent that determine behaviour of the materials in electromagnetic field. The measurements were carried-out in a waveguide resonant cavity that permits precise determination the above-mentioned parameters by perturbation technique. Examined were five different materials designed for use in foundry tooling. Determined was the loss factor that permits evaluating usefulness of materials in microwave heating technology. It was demonstrated that the selected plastics meet the basic criterion that is transparency for electromagnetic radiation.

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