Two-dimensional numerical model for thermal pollution of single-point sources in rivers at different discharge depths
Joint Authors
Shati, Nawras Nomass
al-Baidhany, Jabbar H.
al-Tufayli, Muhammad Abd Muslim
Source
Journal of Babylon University : Journal of Applied and Pure Sciences
Issue
Vol. 17, Issue 1 (30 Apr. 2009), pp.365-374, 10 p.
Publisher
Publication Date
2009-04-30
Country of Publication
Iraq
No. of Pages
10
Main Subjects
Earth Sciences, Water and Environment
Topics
Abstract AR
نموذج عددي ثنائي البعد طور اعتماد على طريقة الفروقات المحددة لاستنباط مخططات الحرارة و الجريان الناتجة من طرح حراري مستمر غير مستقر على النهر من مصدر نقطي أحادي من مواقع طرح مختلفة.
في هذه الدراسة ثلاث حالات طرح الحرارة للنهر استخدمت, الأولى (طرح الملوثات على سطح النهر) و الثانية (طرح الملوثات من مصدر نقطي عدد 0.42 من عمق النهر) و الثالثة (طرح الملوثات من مصدر نقطي عند 0.83 من عمق النهر), حالة الطرح الثالثة تعتبر السهام الرئيسي لهذه الدراسة.
تم استخدام معادلات حفظ الزخم و معادلة حفظ الطاقة.
و كذلك تم استخدام معدلات الاضطراب (k.
ɛ) المطور لحساب معاملات الاضطراب و اللزوجة الدوايمة.
تم تبسيط المعادلات التفاضلية المختلفة الإشكال بطريقة الاتجاه المتناوب (الضمني-الصريح) للفروق المحددة (ADI) مع تطبيق منظومة Up Winding للحصول على معادلات جبرية خطية تم حلها بطريقة كاوس-سيدل (point-by-point Gauss-Siedel).
تمت مطابقة النتائج بمقارنتها مع نتائج دراسة سابقة (الباحثة مي الجلبي ) 1993.
و استخدام فحص الحساسية لمعرفة مدى تأثر النموذج بتغير عدة عوامل مؤثرة على الجريان.
Abstract EN
A two-dimensional numerical model has been developed depending on finite-difference techniques to simulate the temperature and flow patterns resulting from unsteady continuous thermal discharge applied to river stream as a single-point source at different thermal discharge locations.
In this study three cases of thermal discharge to the river reach stream are adopted, first case is at the water surface of the river, second case is as submerged outfall lying at 0.42 from the river depth, while the third case is a submerged outfall at 0.83 from the river depth.
The latest discharge case is considered the basic contribution in this study.
The governing equations in the present model are momentum conservation equation and thermal-energy equation.
The turbulent dynamic viscosity and diffusion coefficient were calculated by using the modified (k - ε) turbulence model.
The partial differential equations were converted into finite difference form using (ADI) finite difference technique with application the up winding scheme and then the set of the linear algebraic equations were solved by Gauss-Seidel Point-by-Point Method.
(Shati, 2007) The results of the system were verified by using a numerical model presented by Al-Chalabi, M.A (1993).
A sensitivity analysis was carried out to study the effect of variations of different parameters on the temperature distribution resulting from the application of the model at and beneath the water surface.
American Psychological Association (APA)
al-Tufayli, Muhammad Abd Muslim& al-Baidhany, Jabbar H.& Shati, Nawras Nomass. 2009. Two-dimensional numerical model for thermal pollution of single-point sources in rivers at different discharge depths. Journal of Babylon University : Journal of Applied and Pure Sciences،Vol. 17, no. 1, pp.365-374.
https://search.emarefa.net/detail/BIM-243787
Modern Language Association (MLA)
al-Baidhany, Jabbar H.…[et al.]. Two-dimensional numerical model for thermal pollution of single-point sources in rivers at different discharge depths. Journal of Babylon University : Journal of Applied and Pure Sciences Vol. 17, no. 1 (2009), pp.365-374.
https://search.emarefa.net/detail/BIM-243787
American Medical Association (AMA)
al-Tufayli, Muhammad Abd Muslim& al-Baidhany, Jabbar H.& Shati, Nawras Nomass. Two-dimensional numerical model for thermal pollution of single-point sources in rivers at different discharge depths. Journal of Babylon University : Journal of Applied and Pure Sciences. 2009. Vol. 17, no. 1, pp.365-374.
https://search.emarefa.net/detail/BIM-243787
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 374
Record ID
BIM-243787