Mathematical Modelling of the Thermal Process in the Aquatic Environment with Considering the Hydrometeorological Condition at the Reservoir-Cooler by Using Parallel Technologies

This paper presents the mathematical model of the thermal power plant in reservoir under different hydrometeorological conditions, which is solved by three dimensional Navier - Stokes and temperature equations for an incompressible fluid in a stratified medium. A numerical method based on the projection method, which divides the problem into four stages. At the first stage it is assumed that the transfer of momentum occurs only by convection and diffusion. Intermediate velocity field is solved by fractional steps method. At the second stage, three-dimensional Poisson equation is solved by the Fourier method in combination with tridiagonal matrix method (Thomas algorithm). At the third stage it is expected that the transfer is only due to the pressure gradient. Finally stage equation for temperature solved like momentum equation with fractional step method. To increase the order of approximation compact scheme was used. Then qualitatively and quantitatively approximate the basic laws of the hydrothermal processes depending on different hydrometeorological conditions are determined.

Numerical Modeling of Influence of the Thermal Power Plant with Considering the Hydrometeorological Condition at the Reservoir – Cooler

This paper presents the mathematical model of the thermal power plant in cooling pond under different hydrometeorological conditions, which is solved by three dimensional Navier - Stokes equations and temperature equation for an incompressible fluid in a stratified medium. A numerical method based on the projection method, which divides the problem into three stages. At the first stage it is assumed that the transfer of momentum occurs only by convection and diffusion. Intermediate velocity field is solved by method of fractional steps. At the second stage, three-dimensional Poisson equation is solved by the Fourier method in combination with tridiagonal matrix method (Thomas algorithm). Finally at the third stage it is expected that the transfer is only due to the pressure gradient. To increase the order of approximation compact scheme was used. Then qualitatively and quantitatively approximate the basic laws of the hydrothermal processes depending on different hydrometeorological conditions are determined.

Analysis of Ship's Safety Improvement in Confined Waters with use of the Decision Support System Based on Expert Manoeuvres

Analysis of Ship's Safety Improvement in Confined Waters with use of the Decision Support System Based on Expert ManoeuvresThe paper presents analysis of possible ship's safety improvement in confined waters with the use of an expert system for navigator's decision support, constructed on the grounds of the knowledge base of gathered manoeuvres for a given type of ship, loading and hydrometeorological condition. The system generates results of encountered decision problems in the form of information about proposed adjustments of main engine, helm and tugs controls and future trajectory presented by means of panoramic graphic interface equivalent to vector large scale ENC and text interface of commands.