### Regional IT-Conference SolIT-2013

**Simmakers** with 3 presentations took part in **the Regional IT-conference SolIT 2013**, which was held on January **26-27** in Soligorsk. Representatives of Russian, Belarus, German, US and UK companies participated in this event. Simmakers had invited technical specialists of such companies as “Belaruskali”, “Trest Shakhtospecstroy” and “Soligorsk Institute for Problems of Resource’s Saving with Experienced Production” to hear the presentations.

**The contents of the presentations are the following:**

• **“Computer simulation and scientific software development”**.* IT section.* The use of computer simulation to improve product quality, manufacturing efficiency and competitiveness of the enterprise. Technological and physical processes simulation in the following areas: machinery construction, environment, mining industry. The process of scientific software development by example of creating software for simulation of heat and moisture transfer in soil under the influence of thermal load of buildings, constructions and cooling devices.

• **“Algorithms and methods of computational meshes creation for numerical solution of the Applied Physics objectives”**. *Development section. * The report highlights an important aspect when simulating applications – building a computational mesh (meshing). The importance of the subject and the needs of manufacture and mining industries in the high-performance solutions in the construction of large computational domains is emphasized. Meanwhile, the practice of working with numerical schemes shows that in order to achieve correct results of numerical solutions it is necessary to enable individualized approach to the computational mesh building. This presentation demonstrates the role of the adaptive component of a step in the mesh building, the performed results are compared with classical solutions. The most complex algorithmic aspects are given, such as an algorithm for computing the volume and area of source geometries in the cell of the computational mesh, the ways of maximum performance achievement (meshing).

• **“Software implementation of finite element method for solving problem of heat transfer in soil”**. *Development section. * Mathematical model of heat conduction objective is a parabolic differential equation with boundary conditions of the first, second or third order. One of the modern numerical methods for solving this objective is the finite element method. This method has several advantages over the finite difference approach, one of the most important is the opportunity to solve a problem in areas with complex geometry. As any numerical method of solving objectives in mathematical physics, finite element method replaces the objective of finding the temperature as a continuous function on the set of algebraic equations, where the unknown is a vector of temperatures at specific points in space. The main principle of transition to a system of algebraic equations is the transition from differential to integral formulation of the objective and piecewise continuous approximation of the unknown function. Coefficients in the system of equations are found by integrating the expressions of elementary volumes (finite elements). When programming the method it is important to find a balance between the software rate and the accuracy of the approximate model. It is necessary to determine in what cases to perform analytical calculations, and where accuracy can be ignored, how to store matrix of coefficients, which method is appropriate to solve a system of linear equations, etc.

Watch video from the conference “Finite element method. Heat transfer problem.”