![](/images/graphics-bg.png)
Flow instability of a liquid through a small-scale channel during a flow evaporation
Joint Authors
Hamid, Azzam Sabah
Idam, Rusul K.
al-Waaly, Ahmad A. Y.
Source
Wasit Journal of Engineering Sciences
Issue
Vol. 10, Issue 2 (30 Jun. 2022), pp.169-184, 16 p.
Publisher
Wasit University College of Engineering
Publication Date
2022-06-30
Country of Publication
Iraq
No. of Pages
16
Main Subjects
Abstract AR
تم استخدام العناصر الحجمية العددية لتحيل لدراسة تأثير التدفق الحراري والتدفق الكتلي على انتقال الحرارة لجريان ثنائي الطور في القنوات الميكروية خلال غليان الماء.
ابعاد القناة كانت 5x5x60) m3) الشروط الحدودية للدخول لحالة الجريان للسائل كانت (1.63، 3.32، 4.9، 6.65، 8.16) kg/m²s 24.8kW/m²، 33.2 kW/m²، 46.13 kW/m2, 51 kW/m² and kw/m2 69 لبدأ الغليان kW / m2 50k/m2, 66.7kW/m2, 83.3 kW/m2, 100k/m2 3.3 لحالة البخار المحمص.
دراجة خرارة الدخول كانت .30°C كانت أعلى قيمة لمعامل انتقال الحرارة كانت في بداية الغليان ثم بعد ذلك تنخفض قيمته نتيجة لتغير طبيعة طور الجريان تبعا لكمية التدفق الحراري المسيطة يتغير شكل الجريان الى الانواع bubble flow dispersed bubbles, chum flow, annular flow, and then dry out condition لمعامل التدفق الكتلي 1.63kg/m2.s كانت اعلى قيمة لمعامل انتقال الحرارة kW/m20 9.5 بينما للتدفق الكتلي kg/m 8.6 كانت أعلى قيمة هي 20kW/m2 C.
للتدفق الكتلي 1.63kg/m2s كانت نوعية البخار تساوي 0.09 بينما للتدفق الكتلي kg/m2 8.1 كانت نوعية البخار تساوي ٠.١٥.
هناك هبوط حاد بالضغط في بداية الغليان بينما اعلى قيمة تحدث عندما يتحول السائل الى البخار المحمص.
Abstract EN
Finite volume analysis of two-dimensional model has been performed to study of the influence of heat flux and mass flux on two phase heat transfer through microchannel during water flow boiling.
The channel dimensions were (5x5xx00) m².
The inlet boundary conditions were (1.63, 3.32, 4.9, 6.65, 8.16) kg/m²s.
The supplied heat fluxes were 24.8kW/m², 33.2 kW/m², 46.13 kW/ m2, 51 kW/m2 and 69 kW/m² for nucleate boiling while 33.3 kW/m², 50 kW/m², 66.7 kW/m2, 83.3 kW/m2, and 100 kW/m² for dryout condition.
The inlet temperature was 30°C.
It was shown that the highest heat transfer coefficient occurs at beginning of onset of nucleate boiling (ONB) after that the it will drop due the changing of the flow patterns.
According to supplied heat flux, the patterns were bubble flow, dispersed bubbles, churn flow, annular flow, and then dry out condition occurs.
For the mass flux 1.63kg/m²s the highest heat transfer coefficient was 9.5 kW/m2°C while for the mass flux 8.16 kg/m²s the highest heat transfer coefficient was 20kW/m2 °C.
For the mass flux 1.63kg/m².s the highest value of vapour quality was 0.09 while for the mass flux 8.16 kg/m²s the highest value was 0.15.
There is a sharp pressure drop when starts to nucleate and the highest value occurs at dryout condition.
This study gave an understanding of the heat exchange flow behaviour during water boiling through a single microchannel.
American Psychological Association (APA)
Idam, Rusul K.& al-Waaly, Ahmad A. Y.& Hamid, Azzam Sabah. 2022. Flow instability of a liquid through a small-scale channel during a flow evaporation. Wasit Journal of Engineering Sciences،Vol. 10, no. 2, pp.169-184.
https://search.emarefa.net/detail/BIM-1572490
Modern Language Association (MLA)
Idam, Rusul K.…[et al.]. Flow instability of a liquid through a small-scale channel during a flow evaporation. Wasit Journal of Engineering Sciences Vol. 10, no. 2 (2022), pp.169-184.
https://search.emarefa.net/detail/BIM-1572490
American Medical Association (AMA)
Idam, Rusul K.& al-Waaly, Ahmad A. Y.& Hamid, Azzam Sabah. Flow instability of a liquid through a small-scale channel during a flow evaporation. Wasit Journal of Engineering Sciences. 2022. Vol. 10, no. 2, pp.169-184.
https://search.emarefa.net/detail/BIM-1572490
Data Type
Journal Articles
Language
English
Notes
Includes appendices: p. 184
Record ID
BIM-1572490