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Home > Analytical Solutions for Some Unsteady Flows of Second Grade and Rate Type Fluids

Analytical Solutions for Some Unsteady Flows of Second Grade and Rate Type Fluids

Thesis Info

Access Option

External Link

Author

Nazar, Mudassar

Program

PhD

Institute

Government College University

City

Lahore

Province

Punjab

Country

Pakistan

Thesis Completing Year

2005

Thesis Completion Status

Completed

Subject

Mathemaics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/671/1/438S.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725499610

Similar


This work presents new results regarding the behavior of some non-Newtonian fluids into different circumstances. After some preliminaries regarding constitutive equations, motion equations and integral transforms, new exact solutions for the ve- locity field and the shear stress corresponding to some flows with technical relevance have been established for ordinary second grade, Oldroyd-B fluids and generalized Maxwell fluids. Just as in the case of Navier-Stokes fluids, it is necessary to develop a large class of exact and approximate solutions, they serving as tests to verify nu- merical schemes that are developed to study complex unsteady flow problems. In chapter 2, by means of the Laplace transform, there are established new exact solutions corresponding to the first problem of Stokes for Oldroyd-B fluids. These solutions, in accordance with the previous results obtained using Fourier sine trans- form, can be easily specialized to give similar solutions for Maxwell fluids. The main aim of chapter 3 was to solve a very important problem, namely to determine the re- quired time to reach the steady-state for the second problem of Stokes corresponding to second grade fluids. In addition to solve this problem we also found new exact so- lutions for this problem. Our solutions, unlike the solutions obtained by Erdogan for Newtonian fluids, are written as a sum between steady state and transient solutions. Chapter 4 contains exact solutions for the unsteady flow of an Oldroyd-B fluid between two side walls perpendicular to a plate. In the absence of side walls the obtained solutions tend to the similar solutions for the flow over a flat plate (the first problem of Stokes). The influence of the pertinent parameters on the velocity of the fluid at the middle of the channel as well as on the shear stress on the bottom is underlined by graphical illustrations. In chapter 5, by means of Laplace and Hankel transforms, we obtained the solutions for unsteady flow of a generalized Maxwell fluid between two circular cylinders. These solutions, presented as a sum of the Newtonian solutions and the non-Newtonian contributions, can be easily specialized to give the similar solutions for ordinary Maxwell fluids. Finally, the influence of the pertinent parameters on the velocity of the fluid are also underlined by graphical illustrations.
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سوانح

سوانح تصانیف فکروفن انتخابِ کلام
ان موضوعات کی روشنی میں مونوگراف کا مطالعہ کرتے ہیں اور اقبال تک پہنچنے کی کوشش
کرتے ہیں۔
سوانح
اقبال کو سمجھنے کے لیے اقبال کی شاعری کو سمجھنا ضروری ہے۔ اقبال کی شاعری کو بہت شہرت ملی ۔ اقبال کی بدولت اردو زبان و ادب کو بھی بلند مقام حاصل ہوا۔ بہت کی زبانوں میں کلام اقبال کے تراجم بھی ہوئے ۔پروفیسر عبد الحق نے تو اپنے مونوگراف میں یہاں تک کا ہے کہ ایک ہزار سال کی علمی تاریخ میں اقبال جیسا مفکر پیدا نہیں ہوا اور اس شعر کو اقبال ہی سے منسوب کیا ہے۔
ہزاروں سال نرگس اپنی بے نوری پہ روتی ہے
بڑی مشکل سے ہوتا ہے چمن میں دیدہ ور پیدا (26)
اقبال 9 نومبر 1877ء کو پنجاب کے شہر سیالکوٹ میں پیدا ہوئے۔ لاہور پنجاب کا دار الخلافہ ہے اور سیالکوٹ لاہور کے قریب ہے۔ سیالکوٹ میں اقبال کے بعد دوسرے عظیم شاعر فیض احمد فیض نے سیالکوٹ میں جنم لیا۔ فیض نے اقبال کو منظوم خراج عقیدت پیش کیا ہے۔
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