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Steady Flow of Fluids With Variable Viscosity

Thesis Info

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Author

Tabassum, Rabil

Program

PhD

Institute

HITEC University

City

Taxila

Province

Punjab

Country

Pakistan

Thesis Completing Year

2019

Thesis Completion Status

Completed

Subject

Mathemaics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/11500/1/Rabil%20Tabassum%20Maths%202019.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727238757

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Nanofluids have wide range applications in processes involving heat transfer due to their proficient thermal conductivity. Such fluids exhibit substantial viscosity variation with temperature. This dissertation presents oblique stagnation point flow of variable viscosity nanofluid over a stretching surface. Porous medium, magnetic field, heat generation, thermal radiation and homogeneous-heterogeneous effects along with partial slip, thermal slip and convective surface are considered. Micro-rotation phenomenon is also fused with nanofluid flow comprising micropolar nanofluid. Nanofluid thermal conductivity is estimated by Maxwell-Garnett model, Hamilton Crosser thermal conductivity model is also employed when shape effects of nanoparticles are considered. Flow problems are first modeled and afterwards converted to non-linear system of ODEs via appropriate similarity transformations. Numerical solutions are obtained via stable and efficient Runge-Kutta-Fehlberg scheme with shooting quadrature and Keller-Box scheme. The impact of key emerging dimensionless parameters on non-dimensional normal, tangential velocity constituents, temperature, shear stress (at wall), heat flux along with streamlines distribution is visualized by graphs.
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پروفیسر عبدالقوی دسنوی

پروفیسر عبدالقوی دسنوی مرحوم
افسوس، پروفیسر عبدالقوی دسنوی اس دنیا سے رخصت ہوئے، اِناﷲ وَاِنا اِلَیہ رَاجِعُون۔ ۷؍ جولائی کو وہ بھوپال کی خاک میں آسودہ خواب ہوئے تو اردو کی دنیا صرف ایک شریف، متین اور نشیط صاحب قلم سے ہی محروم نہیں ہوئی، ایسے مخلص، فعال بلک مجاہد انسان کو کھوبیٹھی جس کا تعلق اس جنس سے تھا جس کو اب نایاب ہی کہا جاسکتا ہے۔
دیسنہ ان کا وطن تھا، سادات کا یہ گاؤں بہار کیا پورے ہندوستان میں ممتاز اور منفرد تھا کہ اکثر باشندوں نے تعلیم قدیم و جدید دونوں کو یکساں اہمیت دی۔ کم ایسی بستیاں ہیں جن کی خاک سے مولانا سید سلیمان ندوی، سید ابوظفر ندوی، سید نجیب اشرف ندوی اور سید صباح الدین عبدالرحمن جیسی شخصیتیں اٹھیں اور علم و قلم کے بادل بن کر ملک کے مختلف خطوں کو سیراب کرگئیں۔
پروفیسر عبدالقوی بھی اسی سلسلہ ابروسحاب کا ایک حصہ تھے۔ بچپن، وطن میں ضرور گزرا جہاں مدرسۃ الاصلاح سے تعلیم کا آغاز ہوا، ۴۲ء میں وہ آرہ کے ہائی اسکول کی آٹھویں جماعت میں تھے لیکن پھر وہ بمبئی آگئے جہاں ان کے والد پروفیسر سید سعید رضا ندوی درس و تدریس کی ذمہ داریاں انجام دے رہے تھے، قوی صاحب نے بمبئی کے مشہور سینٹ زیویر اسکول میں اعلیٰ تعلیم حاصل کی، بمبئی گویا وطن ثانی تھا لیکن قدرت نے ان کے لیے بھوپال دارالاقبال کی سرزمین اس طرح مقدر کی کہ ۶۱ء میں سیفیہ کالج کے شعبہ اردو کی خالی جگہ کے لیے ایک درخواست اور اس کی قبولیت نے ان کو ’’بھوپال والے عبدالقوی دسنوی‘‘ بنادیا، بمبئی کے ہنگامہ خیز اور پرشور ماحول سے نکلے تو کوہساروں، بیابانوں کے نشیب و فراز اور ان کے دامن میں بکھرے زندگی کے تازہ و شاداب جلوؤں اور پرسکون ماحول کو پاکر محسوس کیا...

PENDIDIKAN ISLAM PADA MASA RASULLAH SAW. (PERIODE MEKAH DAN MADINAH)

Islamic education today cannot be separated from Islamic education in Islamic classical era. The Prophet Muhammad has served as a central figure of Islamic education from Islamic classical era to modern Era. The implementation of Islamic education in the time of the Prophet Muhammad can be categorized into Meccan period and Medina Period. In Meccan period, the prophet  put emphasis on tawhid, who used to adhare to politism, to adhare to monotism, that is to believe in Allah the only God. The strategy of education employed by the prophet was secret in nature. Initially, he conducated Islamic education amongst the members of his family and his companions then  to more extended cummunity. In Mecca, the Prophet made the house of al-Arqam ibn Abi Al-Arqam, as the centre of  Islamic education.  In Medinan period, the prophet conducted more complex  Islamic  education  than that  he did in Mecca. Islamic education conducted to covered  (a) Islamic brotherhood; (b) social walfare education;   and (c) nation defence education. In this period, it was mosque that served as the centre of Islamic education.

Physico-Chemical Changes Affecting the Nutritional and Techonological Value of Wheat Grains Stored in Different Type of Containers

Wheat is staple food for most of the world population. However, a lot of grain is damaged and/or wasted during storage particularly in developing countries where a huge quantity of grain is stored as household level. Therefore, proper storage conditions for wheat grains can bring about considerable improvement in national economy through control in losses in both the quantity as well as quality. Information on biochemical changes in wheat because of storage in different household containers and their effects on products are either scanty or outdated. Keeping in view the facts a research was planned to investigate the changes in quality of wheat grains during storage in different containers commonly used at household level in Pakistan i.e. earthen pots, tin containers, cotton bags, jute bags and polypropylene bags. Newly harvested grains of three commonly growing. wheat varieties i.e. Chakwal-97, Margalla-99 and Wafaq-2001 after fumigation were stored for 12 months in two consecutive years i.e. 2003-04 and 2004-05 in these containers at existing environmental conditions. Samples were analyzed before storage and after every 4 months for different quality parameters i.e. moisture content, test weight, flour yield, particle size index, flour color, ash, protein, fat, crude fiber, gluten, falling number, fat acidity, water absorption, dough stability, farinograph quality number, total plate count, fungal colony and chapatti quality. Results of these quality parameters were statistically analyzed. Varietals contribution during storage was significant in most of the quality parameters. Chakwal-97 showed higher PSI, ash, protein, gluten, dough stability, FQN, Chapatti quality score and lower TPC. Margalla-99 is suitable for maintaining low values for moisture, highest flour yield, crude fat, crude fiber and xixwater absorption capacity along with higher chapatti quality score. As for as Wafaq-2001 is concerned it showed its ability to have lower moisture content, higher test weight, PSI, crude fat, crude fiber during storage in different containers and duration. The quality parameters considered in this study were also affected by the storage time. At initial stage lowest moisture, higher test weight and flour yield, lowest fat acidity and microbial infection is evident while storing wheat grains up to 4 months improved protein and gluten content, water absorption capacity, FQN and chapatti quality score. Wheat grains when stored up to 8 months showed improvement in PSI, flour yield, gluten content and dough stability. Twelve months storage of wheat grains showed improvement in flour yield, protein content and farinograph quality number. Storage container was the most important factor of this study, which greatly affected the quality of stored grains. It was observed that grains stored in earthen pots retained most of the quality characteristics i.e. lowest moisture content, highest test weight, flour yield, water absorption capacity, chapatti quality score as well as lowest microbial count. The second suitable storing material was cotton bag. Grains stored in cotton bags showed lowest moisture, high test weighs, flour yield, gluten content and appropriate falling number. Polypropylene bags may be ranked as third showing the highest gluten, dough stability, farinograph quality number with the lowest fat acidity in the stored grains. Grains in jute bags exhibited lower fat acidity, highest dough stability and better chapatti quality score whereas grains in tin pots found to have lower fat acidity, higher water absorption and better chapatti quality score. xxIt was interesting to note that particle size index was the only quality parameter that not affected by any of the factors and their interactions. Highest flour yield could be obtained from Chakwal-97 and Margalla-99 after storing these varieties in earthen pots for 4 months whereas for Wafaq-2001 this quality was maintained up to 12 months when stored in cotton bags. It is concluded that earthen pots are suitable for retaining better values for maximum numbers of all the quality parameters studied during this research followed by cotton bags. Cotton bags were better to store these three varieties up to one year by keeping moisture at lower side and higher test weight.