COMMERCIAL CFD SOFTWARE
LFTM has licenses for the following computational fluid dynamics software and software for analysis of experimental and computational data:
ANSYS 15 (CFX, FLUENT, CFD-POST)
SOFTWARE DEVELOPED AT LFMT
Since 1987, LFMT constantly develops computational fluid dynamics codes to solve complex three-dimensional flow field. At the same time, LMFT develops also codes for experimental data analysis (velocity, pressure measurements)
COMPUTATIONAL FLUID DYNAMICS CODES (CFD)
1. LFMT has developed CFD code which is continuously enriched with new elements. The code solves dimensional incompressible and compressible laminar, transitional or turbulent flows with the method of finite volumes. So far it consists of 65 subroutines. It is written in FORTRAN and has the opportunity to receive during files from C ++ (C-wrappers). It has integrated the following elements:
Solving steady and unsteady flow fields with statistical processing of individual solutions in a time period of flow phenomena
Using generalized curvilinear coordinates to accurately model complex geometries and flow spaces
Technical SIMPLE and SIMPLEC to correct pressure
Numeric formats interference conditions convection and diffusion 2nd and 3rd class HLPA, MUSCL, QUICK, CHARM, UMIST
Besides the classic and simple turbulence model k-e, the code has built the most advanced turbulence models both in the non-linear viscous turbulence models, and in the transport equations of Reynolds stress solving models
Transition models laminar to turbulent flow using laminar kinetic energy
LU-decomposition algorithm to solve the system of equations diakritopoiimenon.
The code is fully parallelized and vectorized to run on massive parallel processing environment (computer clusters) such as 3 clusters of LFMT. The code has been certified in various types of flow (incompressible and compressors) and is the main tool of the LFMT in matters of pure theoretical research.
SUBROUTINE DEPARTMENT OF CFD CODE DEVELOPED IN LFMT
2. The LFMT has developed specialized code for three-dimensional flows radial machines which solves the meridian and radial planes of the machine in successive steps using the stream function.
3. The LFMT has developed specialized codes for solving boundary layers developed under various conditions, suitable for the assessment and certification of turbulence models.
CODES OF TREATMENT OF TEST MEASUREMENTS
In recent years there is ongoing development of general processing and analysis of digital sampling systems
The processing options are the following:
Analysis in the time domain
Statistical analysis in conditions
Analysis in the frequency domain
Flexible frequency filters
Analysis 2D of non-orthogonal data grids
Parametric data interpolation
1D – 2D Fourier analysis
Analysis of eigenvalues ??- eigenvectors
Singular Value Decomposition (SVD)
The data analysis software used in applications that include the following:
In experimental data to calculate turbulent flow sizes, identification of coherent structures using methods Proper Orthogonal Decomposition (POD) and morphological criteria and analysis of acoustic signals
In data computational modeling (CFD) for the statistical aggregates large structures (resolved scales), in recognition of coherent flow structures and stationary sound waves in the POD method and analyzed acoustic internal and external flows.