A COUPLED MODEL SIMULATION OF THERMAL DISPERSION USING CELLULAR AUTOMATA AND NUMERICAL HYDRODYNAMIC MODEL

• Main Author: Amri, Faisal
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/33392
• Institution: Institut Teknologi Bandung

In this research a coupled model was used to simulate a thermal dispersion phenomenon that caused by a continuous source that came out from an outlet in a 10 km x 1 km-sized tidal channel. The thermal dispersion was simulated by using cellular automata while the hydrodynamic condition in the channel was simulated by numerical model. The hydrodynamic condition in the channel was simulated in these schemes : tidal force in the opened boundary, constant outflow rate from the outlet which was 0,4 m/s, and several wind conditions (westerlies and easterlies) as the current generator. The cellular automata model used Von Neumann neighborhood in the advection procces with the cell (main and neighbooring) weighting coefficent (kSUA and kSTA) defined as (formula) The evaluation of cellular automata model shown a similar results with relative (absolute) difference belows 9,13 % (0,001oC) compared to analytical model while the relative (absolute) difference belows 43% (0,3oC) compared to numerical model. Comparison of coupled model with the weighting coefficient with numerical model also shown similar results with relative (absolute) difference belows 7% (0,42 oC). The thermal dispersion pattern after 72 hours of simulation using cellular automata shown that there was a difference about 0,3 km2 (0,35 km2) of area at flood (ebb) tide and westerlies wind condition while in easterlies wind condition, the difference was 0,3 km2 (0,4 km2) at highest (lowest) tide.