VISUALIZATION OF AIRFLOW FROM SPACE HEATERS WITH TURBULENT MODELS

This article reports the results of research on the application of the turbulent model to fluid flow in cavities. This turbulent model was developed using the turbulent kinetic energy equation k, dissipation ɛ and temperature variance θ2 and applying the damping function f. While the equations about the tensor of stress and the vector of heat flux are formulated algebraically. This simulation is carried out at the Rayleigh number Ra = 5 x 1010. This turbulent model is applied to a three-dimensional cavity in the form of a cube and a room with a ratio of 1:2:3. The results were validated using experimental results and Direct Numerical Simulation (DNS) numerical data. Validation of the simulation results shows that the model can predict fluid flow relatively according to the DNS and experimental results. Besides that, this model is relatively simple, easy to use, the grid size is quite applicable for simulation, it is quite stable and the convergence time is relatively fast. From the simulation results it can be concluded that this turbulent model can be easily and fairly accurately applied to indoor airflo