74. Al-Muddaththir/The Enrobed
I/We begin by the Blessed Name of Allah
The Immensely Merciful to all, The Infinitely Compassionate to everyone.
74:01
a. O Al-Muddaththir!
b. O The Enrobed - Muhammad!
74:02
a. Arise and invite people to profess Allah’s Unity and Uniqueness,
b. and warn against disobedience!
74:03
a. Proclaim the Greatness of your Rabb - The Lord,
74:04
a. and purify your garments,
74:05
a. and keep away from all paganism.
74:06
a. And do not extend a favor in expectation of return of a favor.
74:07
a. And be steadfast for the Cause of your Rabb - The Lord.
74:08
a. Finally, when the Trumpet – call of the Resurrection - will be sounded,
74:09
a. that vey time will, indeed, be a very Distressful Time,
74:10
a. it will not be easy for the disbelievers;
b. but it will be easy for the believers despite the intensity of its harshness and horrors.
74:11
a. So leave it to ME to decide what to do with the one whom I created alone,
74:12
a. and then I granted him ample means - abundant and continuous,
74:13
a. and sons to be by his side as a means of power,
74:14
a. and made everything in life comfortable for him,
74:15
a. still he would be greedy, wanting that I should give him more -
b. while mocking and ridiculing MY Messenger Muhammad.
74:16
a. By no means!
b. I shall...
Mankind came at this earth with their needs. The basic needs of mankind are food for eating, water for drinking, and for the protection of selves; they need wearing clothes and shelter to safeguard themselves from rain, hot and cold. The responsibility of living is dependent on these essential requirements. Islam teaches mankind to earn lawful food. Many verses and hadiths are related to earning lawful food. Islam is a peaceful religion. Therefore, to earn lawful (Halal) food is appreciated. This is a fact that the economic stability has positive effects on human beings' faith, believe, ethics, character, thinking, thoughts, personality and the system of a family. Whereas the financial instability puts negative effects on people's faith, believe ethics, character, thinking, thoughts, personality and the system of a family. That is why Islam advises mankind for earning lawful (Halal) foodstuff. All those sources are considered unlawful (Haraam) to earn money, which directly affects society or people’s wealth, life, and faith. The lawful (Halah) money (food) motivates the people towards good works and unlawful (Haraam) simulates the mankind to do sinful deeds. Food affects the body, like same the unlawful (Haraam) money (food) affects the soul. Lawful foodstuff produces a spiritual power in people for doing good and righteous and to inculcate give values, respect and importance to every relationship and to the society at large. The aim of this draft to elucidate the importance of lawful money (foodstuff) and its role in the stability of the family system.
Computational Fluid Dynamics (CFD) is a useful tool that enables highly cost-effective numerical solutions for the problems related to fluid flow phenomena, which in turn results in the state-of-the-art product designs in a variety of engineering sectors. CFD has made remarkable progress due to continuous growth in computing capabilities. Further increase in the computing power urges the computational scientists for even more detailed and in-depth analyses. Better understanding of the flow phenomena, however, requires higher order/resolution solutions, which in turn requires more and more computing power due to increase in the number of degrees of freedom. The present thesis is to contribute in the endeavor of addressing these two challenges, i.e., to provide higher order numerical solutions in fluid mechanics and to fulfill the demand of computing power. The first objective is addressed by presenting a high order flow solver for compressible fluid flow problems and the second objective is addressed by developing a high performance parallel implementation of the flow solver. The present work is aimed at developing a scalable and efficient parallel program based on a high order discontinuous Galerkin (DG) method with Taylor series basis for the compressible Euler and Navier-Stokes equations on unstructured meshes. The numeri- cal scheme is capable of efficiently simulating the physics of the flow problems consid- ered, including subsonic and transonic compressible inviscid flows around two well known benchmark airfoils. The parallel code employs the DG method for the space discretiza- tion of the governing equations to obtain a semi-discrete form and various explicit and implicit schemes for time integration of this semi-discrete form. The explicit time inte- gration scheme is based on three-stage third-order Total Variation Diminishing (TVD) Runge-Kutta (RK) method. The implicit time integration scheme for the Euler equa- tions is based on Backward Euler scheme. The resulting system of algebraic equations iis solved using a variety of so-called matrix-free parallel linear solvers, including Symmet- ric Gauss-Seidel (SGS) method, Lower-Upper Symmetric Gauss-Seidel (LUSGS) method and Generalized Minimum Residual (GMRES) method preconditioned with LUSGS (i.e., GMRES+LUSGS). In this work, a parallel p-multigrid solver for the Euler equations is also presented. Unlike the other p-multigrid solvers where the same time integration scheme is used on all the approximation levels, the present two-level p-multigrid solver uses the Runge-Kutta scheme as the iterative smoother on the higher level approximation, and the matrix-free GMRES+LUSGS method as the iterative smoother on the lower level approximation in an attempt to significantly reduce the computer memory requirements. In this thesis, inviscid flow computations are accurate up to the fourth order of polynomial approximation whereas the viscous flow computations are accurate up to the third order of polynomial approximation. The parallel DG flow solver is based on distributed memory programming model, making use of the message passing approach for communications among the parallel processes. Two kinds of so called commodity parallel systems are used as the platform for per- forming parallel computations. The first kind of parallel systems are the clusters in which the worker nodes are interconnected using some networking technology. The other kind of parallel systems are the multicore SMP machines. The parallelization is based on Single Program Multiple Data (SPMD) parallel programming model that has been em- ployed by making use of a computational domain partitioning technique and the de-facto industry standard Message Passing Interface (MPI) library for inter-process communica- tions. Favorable parallelization characteristics of the discontinuous Galerkin method have also been exploited by hiding the communications behind the computations. The parallel performance of the developed code, in terms of scaling of the speedup with respect to the number of processes, is demonstrated.