PRELIMINARY HEAT TRANSFER SIMULATION MODEL OF A NOVEL DYNAMIC THERMAL ABLATION PROBE

机译：一种新型动态热烧蚀探头的初步传热仿真模型

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Recent advancements in medical technology have included engineering thermal ablation probes, a minimally invasive cancer treatment aimed to heat up cancerous cells. Currently, probes meant to treat hepato-cellular carcinoma (HCC), commonly known as liver cancer, are limited to tumors up to 5 cm across. Consequently, the effectiveness of ablation treatment decreases considerably for tumors beyond this range. Unlike most probes that are stationary, a novel design by Han et al. intends to extend beyond this range via a dynamic probe. We present a mathematical heat transfer model in which the spatial- and time-dependent heat source probe is represented by an ad hoc combination of traveling wave solutions. Specifically, 1D and 2D simulated results for the heat transfer of the dynamic probe are presented in this paper for selected input parameters. This preliminary mathematical model paves the way for optimizing the dynamic thermal ablation probe in future work.

机译：医疗技术的最新进步包括工程热烧蚀探针，旨在加热癌细胞的微创癌症治疗。目前，探针意味着治疗肝细胞癌（HCC），通常称为肝癌，限于高达5厘米的肿瘤。因此，消融治疗的有效性对于超出该范围之外的肿瘤会显着降低。与大多数静止的探针不同，汉等人的新颖设计。打算通过动态探针延伸超出此范围。我们介绍了一种数学传热模型，其中空间和时间依赖热源探针由行波溶液的Ad Hoc组合表示。具体地，在本文中提出了用于所选输入参数的动态探针的传热的图1D和2D模拟结果。该初步数学模型铺平了优化未来工作中动态热消融探头的方式。

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《ASME International Mechanical Engineering Congress and Exposition》|2019年|v.p.|共10页
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Joseph Nakao; Yen-Lin Han;
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5. PRELIMINARY HEAT TRANSFER SIMULATION MODEL OF A NOVEL DYNAMIC THERMAL ABLATION PROBE [C] . Joseph Nakao, Yen-Lin Han ASME International Mechanical Engineering Congress and Exposition . 2019

机译：一种新型动态热烧蚀探头的初步传热仿真模型
6. VOLUMETRIC RECEIVER DEVELOPMENT - A HEAT TRANSFER AND DESIGN EVALUATION OF AN ADVANCED AIR HEATING SOLAR THERMAL CENTRAL RECEIVER CONCEPT (ENERGY, NUMERICAL ANALYSIS, FLUID DYNAMICS, SIMULATIONS, MONTE CARLO). [D] . DROST, MONTE KEVIN. 1985

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8. This article presents a new numerical model describing the behaviour of a thermally thick wood sample exposed to high solar heat flux (above 1 MW/m2). A preliminary study based on dimensionless numbers is used to classify the problem and support model building assumptions. Then, a model based on mass, momentum and energy balance equations is proposed. These equations are coupled with liquid-vapour drying model and pseudo species biomass degradation model. By comparing to a former experimental study, preliminary results have shown that these equations are not enough to accurately predict biomass behaviour under high solar heat flux. Indeed, a char layer acting as radiative shield forms on the sample exposed surface. In addition to this classical set of equations, it is mandatory to take into account radiation penetration into the medium. Furthermore, as biomass contains water, medium deformation consecutively to char steam gasification must also be implemented. Finally, with the addition of these two strategies, the model is able to properly capture the degradation of biomass when exposed to high radiative heat flux over a range of sample initial moisture content. Additional insights of biomass behaviour under high solar heat flux were also derived. Drying, pyrolysis and gasification fronts are present at the same time inside of the sample. The coexistence of these three thermochemical fronts leads to char gasification by the steam produced from drying of the sample, which it is the main phenomenon behind medium ablation. [O] . Pozzobon, Victor, Salvador, Sylvain, Bézian, Jean Jacques 2018

机译：本文提供了一个新的数值模型，该模型描述了暴露于高太阳热通量（高于1 / MW / m2）的热厚木材样品的行为。基于无量纲数的初步研究用于对问题进行分类并支持模型构建假设。然后，提出了一种基于质量，动量和能量平衡方程的模型。这些方程式与液体蒸汽干燥模型和假物种生物质降解模型耦合。通过与以前的实验研究进行比较，初步结果表明，这些方程不足以准确预测高太阳热通量下的生物量行为。的确，在样品暴露的表面上形成了充当辐射屏蔽层的炭层。除了这套经典的方程式之外，还必须考虑到辐射向介质的渗透。此外，由于生物质中含有水，因此还必须在炭蒸气汽化后进行连续的介质变形。最后，通过添加这两种策略，该模型能够在一定范围的样品初始水分含量下暴露于高辐射热通量的情况下，正确捕获生物质的降解。还得出了在高太阳热通量下生物量行为的其他见解。样品内部同时存在干燥，热解和气化前沿。这三个热化学前沿的共存会导致样品干燥产生的蒸汽产生焦炭气化，这是介质烧蚀的主要现象。

PRELIMINARY HEAT TRANSFER SIMULATION MODEL OF A NOVEL DYNAMIC THERMAL ABLATION PROBE

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