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The Fertile pegmatites are known as the most important source of strategic and rare elements. These coarse-grained granitic units are related to potentially granitic intrusions and the identification of the parental intrusion is the first step of their exploration and recognition. In the present paper, the Moshirabad granite-pegmatite system located in southwest of Qorveh has been studied using bulk-rock data and available geological information in order to consider rare elements behavior and their contents. The investigations show that the studied igneous units did not formed in a unique fractionation succession, but rather happened separately in parallel differentiation processes. During sequential injections and development of fractionation (Rb increase and K/Rb decrease), the metals such as Sr, Zn, Ba, REEs, Th, Zr, and Hf were depleted whereas, the elements including Nb, Ta, Be, and Ga were enriched. In addition, the evidences imply that hydrothermal activities, also, involved in the concentration and depletion of the elements. [ABSTRACT FROM AUTHOR]

In this paper, an open-source software framework named “Chesmeh” for numerical solution of the fluid dynamics equations is introduced. The data structure is designed in a way that the software framework supports structured grids on arbitrary number of spatial dimensions. The software has the ability to decompose the numerical grid into several smaller grids for parallel processing. Furthermore, using some functions, the complexity of the parallel programming is considerably made easier for the user. The software is developed using the new features of the C++ programming language, specially the template metaprogramming feature. In addition to the linear finite difference schemes, which can be simply implemented, the nonlinear schemes such as essentially non-oscillatory shock capturing schemes are implemented. Using the software, it is also possible to use compact finite difference schemes, which lead to a tridiagonal system of equations. Defining and applying different kinds of boundary conditions are also predicted in the software. In addition, utilities are considered for file input and output. Using several test cases of compressible and incompressible flows and viscous and inviscid flows, the capabilities of the software are demonstrated. [ABSTRACT FROM AUTHOR]

In this paper three algorithms of Cyclic-Reduction, Parallel-Cyclic-Reduction and ParallelThomas are introduced to solve the Tridiagonal system of equations using GPUs and the effect of coalesced-memory-access and uncoalesced-memory-access to global memory are studied. To assess the ability of these algorithms, as a case-study the simulation of the lid-driven cavity flow have been compared to the results of Runtimes and physical parameters of the classical Thomas algorithm, executed on CPU. The maximum speed-up of these algorithms against CPU runtime is about 4.4x, 5.2x and 38.5x, respectively. Also, approximately a 2x speed-up achieved in coalesced-memory access on GPU. [ABSTRACT FROM AUTHOR]

Predicting wind flow pattern around high rise building, because of some important issues like pedestrian comfort, air pollution, in weak wind region and etc. has great position in wind engineering. Turbulent wind flow over buildings due to the complexity like sharp corners, ground effect, different vortexes and other factors is one of the best choices to evaluate efficiency and accuracy of turbulence methods. Moreover in a large building collection due to high velocity region between buildings, simulating wind flow is more complex. Therefore reaching acceptable result needs a fine grid with an accurate turbulence model that increases computational cost. DES is hybrid RANS-LES models for simulating turbulent flow which for their characteristic, treat near wall as RANS and farther the wall act as LES model. Consequently computational time will decrease compared to traditional LES models. In this article turbulent wind flow over Tarbiat Modares University with DES method in different wind velocities is simulated. Because cells number is great parallel processing has been used. For verification, DES results are compared with traditional LES models such as smagorinsky. The DES results show good agreement with smagorinsky model. [ABSTRACT FROM AUTHOR]