Electrical discharges in liquids have received lots of attention with respect to their potential applications in various techniques and technical processes. Exemplary, they are useful for water treatment, chemical and thermal processes acceleration, or nanoparticles production. In this paper the special utility of discharges for cold pasteurization of fruit juices is presented. Development of devices for its implementation is a significant engineering problem and should be performed using modeling and simulation techniques to determine the real parameters of discharges. Unfortunately, there is a lack of clear and uniform description of breakdown phenomena in liquids. To overcome this limitation, new methods and algorithms for streamers propagation and breakdown phase analysis are presented in the paper. All solutions were tested in “active area” in the form of liquid material model, placed between two flat electrodes. Electromagnetic and thermal-coupled field analysis were performed to determine all the factors that affect the discharge propagation. Additionally, some circuit models were used to include the power source cooperation with discharge region. In general, presented solutions can be defined as universal and one can use them for numerical simulation of other types of discharges.

中文翻译：

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液体中放电的电磁和热现象建模

液体中的放电因其在各种技术和工艺过程中的潜在应用而受到广泛关注。例如，它们可用于水处理、化学和热过程加速或纳米颗粒生产。本文介绍了在果汁冷巴氏杀菌中排放物的特殊用途。为其实施开发设备是一个重要的工程问题，应该使用建模和模拟技术来确定放电的真实参数。不幸的是，对液体中的分解现象缺乏清晰和统一的描述。为了克服这一限制，本文提出了用于拖缆传播和击穿阶段分析的新方法和算法。所有溶液都以液体材料模型的形式在“活性区域”中进行测试，放置在两个扁平电极之间。进行电磁和热耦合场分析以确定影响放电传播的所有因素。此外，一些电路模型被用来包括电源与放电区域的配合。一般来说，所提出的解决方案可以被定义为通用的，并且可以将它们用于其他类型放电的数值模拟。