M.Phil / MS
Permanent URI for this collectionhttps://repository.cuilahore.edu.pk/handle/123456789/52
This collection archives the complete set of theses produced by students of the COMSATS University Islamabad, Lahore Campus.
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Item Study on the Heat and Mass Transport of Non- Newtonian Powell-Eyring Model Fluid Over Variable Thicker Sheet(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2021) Muhammad Ahsan; CIIT/SP20-RMT-031/LHR; Dr.Mohsan Hassan; LHR TP 7635Non-Newtonian fluids are used in a wide range of industries, including the polymer sector, the food industry, and even everyday life. The viscosity behaviour of these fluids identifies their rheological behaviour. Many factors affected viscosity change, including temperature, shear rate, pressure, and so on. When heat and mass flows are explored simultaneously, these effects cannot be underestimated, particularly temperature. In this thesis the problem for Study the Heat and Mass flow of Non-Newtonian Powell-Eyring model fluid is explored across a variable thicker sheet. The fluid is considered to be incompressible, laminar, non-newtonian over variable thicker sheet. All the programming is done on MATHEMATICA. The mathematical model is based on partial differential equations (PDEs) that represent continuity, momentum, and energy. To determine the model's solution, it is first converted into an ordinary differential equation (ODEs), which is then solved using the RK-Method. The model's output is presented in the form of velocity and temperature profiles, as well as various parameters.Item Molecular Topological Indices Based Analysis of Thermodynamics Properties of Terbium Dioxide(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2021) Amir Hassan; CIIT/SP20-RMT-025/LHR; Dr. Sana Javed; LHR TP 7633The term used to illustrate a molecule/chemical compound in the form of graph is known as molecular/chemical graph. Molecules are usually represented as vertices while their bonding interaction is shown by edges in a molecular graph. In this thesis, we computed various connectivity indices based on degrees of vertices of chemical graph of Terbium Dioxide (Tb𝑂2) and Graphitic Carbon Nitride (g-𝐶3𝑁4) including general Randic, ABC, GA and Zagreb indices etc. Afterwards, we found the physical measures like entropy and heat of formation of Tb𝑂2 and g-𝐶3𝑁4. Then, we fitted curves between different indices and the thermodynamical properties namely heat of formation and entropy. Curve fitting was done in MATLAB through different methods based on linearity and non-linearity. The performance of the method was tested using root mean squared error (RMSE), the sum of squared errors (SSE) or R2. Further, we gave graphical representations of these indices. These mathematical frameworks might provide a way to study the ther - modynamics properties of the chemical structure of Terbium Dioxide (Tb𝑂2) at intense level which will assist to comprehend the relationship between system dimension and these measures. This thesis is divided into five chapters. Chapter 1 includes the basic definition , notions and terminologies related to thesis. Chapter 2 provides a review of literature about out work .The main results are given in chapter 3 .Chapter 4 contains a brief discussion about the work while the chapter 5 consists of the references used in this thesis