Observation of Rayleigh Benard Convection as A Representation of Learning of Natural Phenomenons Through Water Molecular Movement

Research has been carried out with a device to observe the phenomenon of Rayleigh Benard convection, made glass box bounded by lower plate and an upper plate. The bottom is hotter than top which functions heat horizontal fluid layer from below. This study aims water molecule movement. observation medium was mixed teak sawdust as representation particles average density mean=0.99 g/cm3. variation thickness (d) used 5 cm 6 variations in temperature difference (DT) increase 50°C. Data collected cellphone camera run Windows Movie Maker software time accuracy up 0.001 seconds. It observed that between two plates resulted velocity motion convection depicted v-DT diagram. Due also results movement patterns molecules, namely laminar turbulent. turbulent phase number value R~107, indicated flow getting faster, direction starts become irregular sometimes signs vortex appear. At different immersion start phase. for d=5cm at DT~30°C, d=6cm DT~20°C. Furthermore, this RBC learning natural phenomena air fluids, whirlwinds event due differences pressure