Modeling microwave heating of frozen mashed potato in a domestic oven incorporating electromagnetic frequency spectrum

微波食品加热 微波炉 高斯分布 单色 光学 等距 腔磁控管 计算物理学 物理 数学 薄膜 几何学 量子力学 溅射
作者
Krishnamoorthy Pitchai,Jiajia Chen,S.L. Birla,David Jones,Jeyamkondan Subbiah
出处
期刊:Journal of Food Engineering [Elsevier BV]
卷期号:173: 124-131 被引量:49
标识
DOI:10.1016/j.jfoodeng.2015.11.002
摘要

Domestic microwave oven magnetrons produce microwaves in a frequency range of 2.45 ± 0.05 GHz. Most microwave heat transfer simulations simplify that the magnetron produces a monochromatic electromagnetic wave of frequency of 2.45 GHz to reduce the computational complexity. This study assumes that the magnetron produces a frequency spectrum defined by a Gaussian distribution of frequencies with a central frequency of 2.45 GHz and investigates the effect of Gaussian distribution variance of (0.05 GHz)2, (0.025 GHz)2, (0.017 GHz)2 on prediction accuracy when compared to using monochromatic frequency of 2.45 GHz. A three-dimensional finite element model coupling electromagnetic and heat transfer physics was developed to simulate heating of 550 g of frozen mashed potato for 6 min. The model was validated in a 1250 W rated microwave oven with the mashed potato tray placed at the center of the stationary turntable. The electromagnetic power densities were determined separately at five different frequencies equidistant between 2.4 and 2.5 GHz. They were then weighted averaged, based on the selected Gaussian distribution. Simulated temperature profiles of the models using the monochromatic frequency of 2.45 GHz and Gaussian frequency spectrum with different variances were compared with experimental temperature profiles obtained using a thermal imaging camera at the end of cooking and five fiber-optic thermocouples during cooking. The model results showed that predicted spatial surface temperature pattern by the model using frequency spectrum with the largest variance (0.05 GHz)2 had better agreement with the experimental temperature pattern when compared to that using a monochromatic frequency of 2.45 GHz. In the transient temperature profile measurement, the average RMSE value of five locations was 7.5 and 13.1 °C for simulations using frequency spectrum and monochromatic frequency of 2.45 GHz, respectively. When compared to using the monochromatic frequency of 2.45 GHz, the frequency spectrum with an assumption of having a Gaussian distribution with mean of 2.45 GHz and variance of (0.05 GHz)2 improved the accuracy of temperature field pattern and transient temperature profile.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
1秒前
中大奖的英姑完成签到,获得积分10
1秒前
888发布了新的文献求助10
1秒前
cora发布了新的文献求助10
2秒前
旺仔完成签到 ,获得积分10
3秒前
小埋发布了新的文献求助10
3秒前
汉堡包应助xixi采纳,获得10
3秒前
眼睛大雨筠应助qq采纳,获得30
4秒前
5秒前
kaier完成签到 ,获得积分10
5秒前
望北楼主发布了新的文献求助10
6秒前
orangelion完成签到,获得积分10
6秒前
7秒前
7秒前
隐形曼青应助cora采纳,获得10
7秒前
7秒前
8秒前
9秒前
9秒前
10秒前
haibing发布了新的文献求助10
10秒前
李爱国应助断舍离采纳,获得10
10秒前
在水一方应助111采纳,获得10
11秒前
漾黎发布了新的文献求助10
12秒前
12秒前
是莉莉娅发布了新的文献求助30
12秒前
lily发布了新的文献求助30
12秒前
小芙爱雪碧完成签到 ,获得积分10
12秒前
14秒前
111发布了新的文献求助10
14秒前
深情安青应助Albertxkcj采纳,获得10
15秒前
微笑的白羊完成签到,获得积分20
16秒前
16秒前
17秒前
18秒前
传奇3应助邓柳采纳,获得10
18秒前
科研通AI5应助帅气男孩采纳,获得20
19秒前
19秒前
孙成成发布了新的文献求助10
19秒前
pbj发布了新的文献求助10
20秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3969782
求助须知:如何正确求助?哪些是违规求助? 3514601
关于积分的说明 11174816
捐赠科研通 3249899
什么是DOI,文献DOI怎么找? 1795080
邀请新用户注册赠送积分活动 875599
科研通“疑难数据库(出版商)”最低求助积分说明 804886