آداب معاشرت، سورة حجرات کی گیارهویں اور بارهویں آیات کے تناظر میں

Dr. Shari'ati is a revolutionary intellectual personality of this century. He regarded Islamic values ​​as the guarantee of salvation and success for humanity. He sought to mobilize and revive frozen Islamic ideas. That is, tried to bring the Islamic concept out of the boundaries of formal and congested boundaries into common and general thoughts. Dr. Shari'ati also presented a unique view that divine Imam transcends than worldly governments and this divine leadership cannot be determined by (Shuraiet). Rather, it can be diagnosed by an obvious reason (Nass). This doctrine of Dr. Shari'ati is contrary to the ideology of the Sunni and the Shi'ite’s concept of Imamat and Khilafat because the Sunni sect believes that Khilafat Or Imamt should be determine by the Shurait (Council) and Shiites by the will(Nass). According to Dr. Shairathi, Imamat cannot be determining through Shourait or Nass but it can be identified by the superior attributes of the Imam. He believes that Imamat is not an external factor which can gain by attainment or by choice; rather, it is an Inherit object.  In accepting this doctrine of Dr. Shari'ati, than the Imamat becomes a part of the system of naturalism (Takveeni). That makes the Imamat not a model process for humanity. So it would be a complicated issue to discuss and discover either the theory of Dr. Shari'ati is a applicable idea of Imamat or it is a just onlyu idialogy which cannot be practiced. The dissertation has been written to examine the reality of these two cases either Imamat is inherit case or it can be attainment case through Shouriat or Nass.   

Numerical Simulation of Complex Flows of Fibre Reinforced Composites

Complex laminar flows of incompressible fluids have been investigated numerically. Both Newtonian and generalised non–Newtonian fluids are simulated, whilst for generalised non–Newtonian fluids, two shear thinning models, i.e., Bird–Carreau and Power law, are employed. Both models are. For numerical investigation the flow problem adopted is two–dimensional axisymmetric periodically constricted tube. The frame of reference used in the investigation is cylindrical polar co–ordinates. For the simulation two–dimensional momentum transport equation is solved using a Finite Element Method (FEM). Numerical scheme used is known as Taylor–Galerkin/pressure–correction algorithm. In open literature this problem is simulated only for single aspect ratio (amplitude) of the undulation in the absence of fibres. Whereas, in this research investigation principal aim is introduction of fibre reinforced composite material. Different aspect ratios of undulation are also simulated at various inertial forces. For comparison purpose with other experimental results as well as numerical prediction, initially, flow is considered for constant viscosity Newtonian fluids through periodically constricted tube. Subsequently, from dilute to semi–dilute rigid rod like fibre suspended in all fluid models, i.e., constant viscosity, Bird–Carreau and Power law fluids have been examined. For different undulation levels of periodically constricted tube, the critical values of the Reynolds number have been identified, where beginning of embryo recirculation region starts. As inertial force increases, augmentation of vortex is observed in the undulation region. While, introducing fibres vortices shrinks in length and intensity. For Newtonian, power law and Bird–Carreau models pressure isobars are also demonstrated. In all levels of fibre concentration, the graphical illustration of calculated data for friction factor as well as empirical relationships is illustrated for all undulation aspect ratios.