A Study on the Violent Interactions of an Immiscible Drop impacting on a Superheated Pool

الموضوعات

علوم بحتة وطبيعية

الملخص

A Study on the Violent Interactions of an Immiscible Drop Impacting on a Superheated PoolMohamad AlchalabiThe interactions between two immiscible liquids of different temperatures can be violent to the extent of causing harm to individuals, or damage to equipment, especially when used in the industry. Only a few studies investigated these interactions but they could not produce the violent interactions often reported by the industry, and therefore their results did not help much to develop clear understanding of the dynamics of these interactions. In this work, a high speed imaging system operated at 100,000 frames per second was utilized to record the events and phenomena taking place upon the impact of Perfluorohexane droplet at room temperature onto a hot soybean oil pool at temperatures as high as 300 ºC. The impact velocity was varied by varying the height of the droplet before it pinches off under its own weight. The recorded events identified the occurrence of vortex ring vapor explosions, weak and strong nucleate boiling, and film boiling. An impact velocity vs. oil temperature diagram identifying the regions in which each of these phenomena takes place was generated, and the dynamics driving their occurrences were explored. The vortex ring vapor explosions were found to become less violent as the impact velocity was increased, which was attributed to the existence of a smaller amount of liquid Perfluorohexane within the rings at high speed impacts, which does evaporate but does not expand violently. Weak nucleate boiling occurred at very high impact velocities relatively. As the temperature is increased, however, they start5turning into strong nucleate boiling. The strong nucleate boiling usually starts right upon impact, and when the temperature of the oil at one impact velocity is increased, it starts turning into film boiling, in which the liquid Perfluorohexane is covered by a vapor layer of its own vapor.

روابط وملفات

التعريف والنوع

رقم الوثيقة

058b0fac-f3d9-482b-8934-aa39509f7707

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1700394_1.pdf

بيانات النشر

ألقاب المؤلفين

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اللغة

English

المصدر والدورية

اسم المصدر

A Study on the Violent Interactions of an Immiscible Drop impacting on a Superheated Pool

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

Dynamics , Explosion , Impact , Interactions , Ring , Vortex

إشراف وإعداد

الإشراف

سيجوردور ثورودسن

الإعداد

محمد الجلبي

الاقتباسات الببليوغرافية