Heating pattern of frozen food affected by microwave oven frequency

In this study, the frequency distributions of a commercial domestic microwave oven with and without load were measured. Computer simulation model was developed to study the influence of varying frequencies on heating pattern of frozen food while heated in a domestic microwave oven. A commercial software tool QuickWave was used to build up the simulation model using the finite-difference time-domain (FDTD) method to solve coupled electromagnetic and heat transfer equations. Results showed that the operating frequency of a domestic microwave oven was constantly changing with time. The heating patterns of stationary and rotating frozen food changed when the frequency varied from 2400 to 2500 MHz. The cold and hot spots of frozen foods were not stable even for the same load due to the shifting frequencies.

[1]  S. Ohkawa,et al.  Analysis of Power Density Distribution in Microwave Ovens , 1978 .

[2]  O. Hashimoto,et al.  Computer Simulation of Temperature Distribution of Frozen Material Heated in a Microwave Oven , 2010, IEEE Transactions on Microwave Theory and Techniques.

[3]  R. Anantheswaran,et al.  SIZE AND SHAPE EFFECT ON NONUNIFORMITY OF TEMPERATURE AND MOISTURE DISTRIBUTIONS IN MICROWAVE HEATED FOOD MATERIALS: PART II EXPERIMENTAL VALIDATION , 1998 .

[4]  Abdelilah Ghammaz,et al.  Spectral behavior of domestic microwave ovens and its effects on the ISM band , 2003, Ann. des Télécommunications.

[5]  Ashim K. Datta,et al.  Modeling the heating uniformity contributed by a rotating turntable in microwave ovens , 2007 .

[6]  C. Seyler,et al.  Influence of the dielectric property on microwave oven heating patterns: application to food materials. , 1997, The Journal of microwave power and electromagnetic energy : a publication of the International Microwave Power Institute.

[7]  R. Vadivambal,et al.  Non-uniform Temperature Distribution During Microwave Heating of Food Materials—A Review , 2010 .

[8]  A K Datta,et al.  Thawing of foods in a microwave oven: II. Effect of load geometry and dielectric properties. , 1999, The Journal of microwave power and electromagnetic energy : a publication of the International Microwave Power Institute.

[9]  Juming Tang,et al.  Dielectric properties and other physical properties of low-acyl gellan gel as relevant to microwave assisted pasteurization process , 2015 .

[10]  Tatsuya Kashiwa,et al.  Analysis of Electromagnetic Fields in a Mass-Produced Microwave Oven Using the Finite-Difference Time-Domain Method , 1996 .

[11]  Richard Bergman,et al.  SELECTIVE RE-MESHING: A NEW APPROACH TO INCLUDE MODE STIRRING EFFECTS IN THE STEADY STATE FDTD SIMULATION OF MICROWAVE HEATING CAVITIES , 2006 .

[12]  A K Datta,et al.  Coupled Electromagnetic and Termal Modeling of Microwave Oven Heating of Foods , 2000, The Journal of microwave power and electromagnetic energy : a publication of the International Microwave Power Institute.