دورية أكاديمية
Phase Interface Dynamics and Heat Transfer Mechanisms in Evaporating Droplet and Pool Boiling Processes
| العنوان: | Phase Interface Dynamics and Heat Transfer Mechanisms in Evaporating Droplet and Pool Boiling Processes |
|---|---|
| المؤلفون: | Mondal, Md Tanbin Hasan |
| المصدر: | Doctoral Dissertations |
| بيانات النشر: | Louisiana Tech Digital Commons |
| سنة النشر: | 2024 |
| المجموعة: | Louisiana Tech Digital Commons |
| مصطلحات موضوعية: | Phase-change heat transfer, MEMS device, Moving contact line, Capacitance sensing, Thermal sensing, Droplet evaporation, Engineering, Nanoscience and Nanotechnology |
| الوصف: | Despite the significant importance and widespread use of phase-change cooling techniques, there are still fundamental questions about the microscopic processes that govern the heat transfer mechanisms. In order to gain a better understanding of the underlying physics involved, it is essential to have information at the microscale regarding the surface temperature distribution with time as well as the location and speed of the moving contact line (MCL). A comprehensive understanding of heat transfer mechanisms and phase-interface behavior during phase-change cooling is crucial for improving heat transfer models, optimizing surface engineering, and maximizing overall effectiveness. Firstly, this dissertation presents a capacitance-based microdevice capable of tracking a moving phase interface at the microscale for unconstrained liquid droplets. This microdevice is comprised of an array of planar interdigitated electrodes beneath a thin insulating polymer layer. During the experiments, monitoring changes in capacitance with time facilitated sensing the MCL location and speed as it passes over each capacitance sensor. This capacitive sensing scheme is noninvasive to the system under study, allowing its implementation into many types of existing hardware and devices and not requiring optical access to the phase change area of the device. Implementing multiple capacitance sensors in adjacent proximity for a semiconducting based demonstrated a few limitations, including coupling effects, but it did not prevent the effective detection of MCL. Utilizing a dielectric substrate demonstrated notable improvements, including but not limited to increased capacitance signal outputs and reduced coupling effects for multiple sensors in adjacent proximity. Moreover, this sensing scheme demonstrated the efficient tracking of MCL during droplet evaporation across different surface temperatures, establishing its functionality at elevated temperatures and during phase-change heat transfer processes. Next, multifunctional sensing in an ... |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| العلاقة: | https://digitalcommons.latech.edu/dissertations/1016Test; https://digitalcommons.latech.edu/context/dissertations/article/2029/viewcontent/Dissertation___Md_Tanbin_Hasan_Mondal.pdfTest |
| الإتاحة: | https://digitalcommons.latech.edu/dissertations/1016Test https://digitalcommons.latech.edu/context/dissertations/article/2029/viewcontent/Dissertation___Md_Tanbin_Hasan_Mondal.pdfTest |
| رقم الانضمام: | edsbas.E55028C9 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |