A numerical study of the two-dimensional steady free convection flow in an inclined annulus between two concentric square cavities filled with a porous medium is presented in this paper for the case when the side outer walls are kept with differentially heated temperature while the horizontal outer walls and the inner walls are insulated. The heated wall is assumed to have spatial sinusoidal temperature variation about a constant mean value. The Darcy model is used and the fluid is assumed to be a standard Boussinesq fluid. For the Cartesian coordinate system, the governing equations which were used in stream function form are discretized by using the finite difference method with successive under – relaxation method (SUR) and are solved by Gauss-Siedel iterative method. The upwind scheme was used for the transport terms in the energy conservation equation. The results are presented to demonstrate the streamlines, the isotherms, and the Nusselt number depending on the Rayleigh number ranging from (Ra =10 to 1000), dimension ratio from (Dr = 0.15 to 0.45), and the inclination angle from (= 0o to 45o). Also the effects of the amplitude (=0 to 1) and the wave number (f =0 to 5) of the heated side wall temperature variation on the free convection are investigated. The results show the effect of previous parameters (Ra, Dr,, , and f) on the flow fields and temperature profiles. It also show that the average Nusselt number is a strong function of the Rayleigh number, inclination angle, dimension ratio, and temperature variation. The peak value of the average Nusselt number based on the hot wall temperature is observed to occur at dimension ratio of (0.15), inclination angle of (40.1°), amplitude and wave number (1 & 0.75) for Rayleigh number of (1000).
Of good reasoning (the art of unique moral turn him poets of Andalusia in
poetry verse emitter myself, and to achieve a very technical. Either the emitter is
related to the nature of the environment and the composition of personal Andalusia
of appetite for life and interaction with the legibility beautiful, and it was (wit)
feature in them even said they are charming as Bagdad ions , and either art, it made
them this color to show their ability intellectual in the search for bugs, and
stimulate their imaginations in a contract equations in the interpretation and find
justifications for the ideas and meanings Exaggeratedly times, and especially in the
purpose of praise, and novelty in many cases, as in the spinning
مثل الوعي الطبقي اعلى مراحله لدى الفكر الماركسي الحديث عند كل من ماركس وانجلز ولينين ليس مجرد انعكاس للواقع وانما يكون بصورة جدلية من خلال انعكاس الوعي على الواقع واعادة انتاجه فبعد ان كان الوعي هو نتاج تطور الواقع اصبح اداة في تطوير الواقع، أي تأثير البنى الفوقية على البنى التحتية( المادية التاريخية) بعكس ما دعى اليه ماركس، اذ أعطى لينين للوعي دوراً كبيرا في التطور التاريخي، وعد الوعي الطبقي هو الاداة التي
... Show MoreIn this study, the researcher aimed to define and measure the relevance and effect of the governmental organizations in complying with Iraqi Ministry of Transportation's requirements towards achieving the social responsibility, embodied in the ten commandments of the United Nations Findings displayed the availability of realization regarding organization managers towards social responsibility with their various capabilities and tendencies in relation with the representing entries of those Ten Commandments.The study showed the relation between the effectiveness of those organizations and dimensions of the ten commandments of social responsibility, with the existence of a significant effect for the said effectiveness on achiev
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All over the world and in different societies and cultures , people are always looking for different ways of favourable , gentle smooth and soft communication .The 'powerful linguistic devices ' that are embedded in the daily English language is called "euphemism". It plays an important and vital role in daily communication. It represents a significant part of English . It is used to express any aspect of everyday realities such as the business world , mass media , etc. The comprehension of such realities can not be verified unless a reasonable command of euphemism is achieved.
Euphemism is defined according to various perspectives and views. It is " that figure of speech which consists in the substitution of a word or expression of c
تكمن مشكلة البحث بان المؤسسات عامةـ والتعليمية منها خاصةفي الوقت الحاضرتواجه ظروف بيئيةتفرض عليها حتمية التغيير ، وذلك بسبب التحولاتالتي تحدثفي عالمناالحالي سواءًكان على المستوىالمحلي أو العالمي أو على المستوىالمؤسسة نفسها مما يجعلمؤسساتنا التربويةبحاجةملحةلمواجهة هذا التغيير القادم وذلك من خلال معالجةالمشكلاتالتي قد تظهر بطرق مبتكرة وابداعية مغايرةللطرقالتقليدية ،وذلك من خلال تهيئة المناخ الت
... Show Moreيُعد الذكاء الاصطناعي من العلوم الحديثة التي ارتبطت بالإنسان منذ العقود الخمسة الماضية، وأصبحت السياسة الرقمية جزءاً لا يتجزأ من المجتمع لكونها تُستعمل في أغلب مجالات حياة الإنسان. وهذا ما شجع صانعي السياسات التكنولوجية الجديدة في التفكير بكيفية توظيفه لخدمة مصالحهم العليا السياسية والاقتصادية، بغض النظر عن بذل الجهود للتفكير في تنظيمهم للذكاء الاصطناعي التوليدي، ووضع قيود تراعي التشريعات الدينية، وقوا
... Show MoreThe Research aimed for identification the significant of health problems that occurrences through
misused of computer for those whom attaches with more than two hours daily and to identification the
nature of demographical characteristics variables and that related variables with using computer. Also to
know the level of user’s knowledge for some attaché’s equipment's and finally creating a new suggested
measurement scale for studying health problems that were occurred through misused of computer.
Creating questionnaire includes several domains (Social problems – family environment, Social problems –
external environment, some health problems attaches with related equipment's, psychological problems,
and hea
The study of the Baghdad personalities is an important issue because the owners of these personalities usually belong to the elite, which play a distinct role in the development of any society in all political, economic, social and cultural fields. These include the study of the personal personality of Father Anastas Marie Carmeli to highlight many aspects of personality And his clear fingerprints on the movement of society in the field of culture and thought
That Karamli's efforts in the field of language, literature and history made him one of the most prominent pioneers of Renaissance late in the history of modern Iraq
הקדמה
הריאליזם הספרותי במשמעו הכללי מצייג אשר כל מה מציינת בה הספרות מציורים מדוייקים לסביבה ולכן אדם. ויש להתחשב בפרטים המשותפים לחיים היומיומית.
האסכולה הריאליזטית מצטיינת בזיאנרים אין זוכים בם איזו אסכולה ספרותית אחרת. האסכולה הזאת הופיעה בספרות העברית החדשה כתוצאה להשפעתה של הספרות העברית בס
... Show Moreهدف هذا البحث إلى قياس الإجهاد الرقمي لدى طلبة جامعة بغداد، والكشف عن الفروق في الإجهاد الرقمي بناءً على متغيرات الجنس (ذكر - أنثى)، والمرحلة الدراسية (أولى - رابعة)، والاختصاص (علمي - إنساني). تألفت عينة البحث من (200) طالبًا وطالبة من جامعة بغداد، وتم تطبيق مقياس" الإجهاد الرقمي "الذي تم إعداده من قبل الباحثة خصيصًا لهذا البحث. وتم اعتماد المنهج الوصفي التحليلي وبعد تطبيق مقياس البحث وتحليل النتائج بالوسائل الإحص
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