## MATHEMATICAL MODELLING OF THE DISCHARGED HEAT WATER EFFECT ON THE AQUATIC ENVIRONMENT FROM THERMAL POWER PLANT BY USING TWO WATER DISCHARGED PIPES
## 摘要The paper presents a mathematical modeling of the thermal load on the aquatic environment by using two water discharged pipes of thermal power plant. It is solved by the Navier-Stokes and temperature transport equations for an incompressible fluid in a stratified medium. The numerical solution of the equation system is divided into four stages by using a projection method which was approximated by the finite volume method. At the first step it is assumed that momentum transfer was carried out only by convection and diffusion where the intermediate velocity field is solved by 5-step Runge-Kutta method. In the second stage, the pressure field is solved by using the intermediate velocity field where the Poisson equation for the pressure field is solved by Jacobi method. The third step is assumed that the momentum transfer is carried out only by pressure gradient. The fourth step of the temperature transport equation is also solved as momentum equations. The obtained numerical results of stratified turbulent flow for two water discharged pipes were compared with experimental data and with numerical results for one water discharged pipe. General thermal load in the reservoir-cooler decreases comparing one water discharged pipe and revealed qualitatively and quantitatively approximately the basic laws of hydrothermal processes occurring in the reservoir-cooler can be seen that from numerical simulations where two water discharged pipes were used. |

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