ماحولیاتی آلودگی اور اس کا سدباب: سیرت نبویﷺکی روشنی میں ایک تحقیقی جائزہ

Today, the whole world is facing the dangerious issues of environmental pollution. There is a lot of piles of garbage, plastic bags and waste are found in common routes and streets, the use of bacterial and antiseptic chemicals, smoking as well as the excessives use of machinery causes the abundance of smoke and due to the noise of vehicles, rugs, motorcycles, factories and airplanes, our daily pollution is increasing daily. As a result, many problems including various types of illness and seasonal variations are becoming a major challenge for today's modern era. In order to deal with it, it is important for us to study and follow the instructions of the Prophet (PBUH). Prophet (PBUH) has taken important measures to protect environmental pollution. He has prescribed some precautionary measures to prevent the spreading of dirt in society and keeping the environment clean to avert the soil pollution. For the purpose of aviation of air pollution, the prophet has ordered to populate it with the livestock andplantation. To cope with water pollution, it was emphasized to keep water clean and cleaness of air from odor and dirt. In this modern era, prevention of environmental pollution without following these instructions is impossible. This article has invesitaged on prevention of enviromental pollution and cleanliness of enviroment in the light of Sīrah.

Analytical Solutions for Boundary Layer Flows of Differential Type Fluids

The study of unsteady flow and heat transfer of non-Newtonian fluids over stretching surface is very important and serves a widespread variety of practical applications in industry. In this thesis, a theoretical study is undertaken into fluid flow and heat transfer due to stretching surface for the non-Newtonian second grade fluid. The second grade fluid considered in the current analysis is a subclass of differential type nonlinear fluid. Additionally, second grade liquid is capable to explore the features of normal stress impacts. More specifically, this thesis is concerned with study of the unsteady boundary layer flow and heat transfer characteristics for a second grade liquid over stretching surface and considered different problems of practical interest. The problems include, the forced convective heat transfer over stretching surface assuming different situations including nanolfuid, chemical processes and Cattaneo-Christov heat and mass flux relations. The transformed boundary layer equations are solved analytically by the homotopy analysis method. The analytical solutions have been computed for the velocity, temperature and concentration distributions. The effects of important physical parameters are presented graphically in order to visualize the impact of these parameters. The effects of non-dimensional parameters on the temperature, concentration and local Nusselt are elaborated through graphs and tables. The effect of non-dimensional parameters on the local Nusselt is discussed by using graphs. The obtained results reveal that the temperature profile diminishes for augmented values of the thermal relaxation parameter. In addition to this, it has come to the observation that the liquid temperature is higher for classical Fourier''s law when compared to non- Fourier''s law. It is estimated from the plots that the concentration of the second grade nanoliquid drops as the Brownian motion parameter increases while the reverse trend is detected for the thermophoresis parameter. Moreover, it is perceived from the results that the temperature of the second grade nanoliquid declines as unsteadiness parameter enhances.