Study Of Thermal Plumes Research Articles

CFD Model of Thermal Plume Occuring above Hot Surface of Kitchen Appliance

During the cooking process, pollutant fumes are released into the ambient air by the convection plumes. These convective plumes - thermal plumes – are generated above hot surfaces and they need to be efficiently and ecologically ventilated in order to achieve appropriate internal climate. Calculation method for determination of volume flow rate of rising convective plumes is described in German standard DIN 18869 [1]. This article focuses on study of thermal plumes using numerical model in software Ansys Fluent, determinates volume flow rate of rising air and compares the simulation results with the results from known computational relations.

Weak 2D Convective Plumes in a Sloping Permeable Layer

This is a study of thermal plumes in a permeable fluid-saturated slab of a porous medium (of finite uniform thickness but otherwise infinite extent) that is heated by either an instantaneous or a steady line source embedded in the medium. The slab, which may be horizontal or sloping, is initially at ambient conditions; the impervious upper surface remains at the ambient temperature, while the impervious base is thermally insulated. The transient temperature distribution, the surface heat flux and the convective flow velocity are calculated for small instantaneous line heat energy sources. They show how the flow develops, spreads and slows as time progresses, and an estimate of the time to decay is given. Steady-state temperature and velocity profiles are calculated for embedded line sources that provide heat energy at a small constant rate, and the surface heat flux distribution is calculated.

Sodar echo patterns and study of thermal Plumes over Thumba

An investigation has been made on the behavior of the thermal plume height in the daytime Convective Boundary Layer (CBL) using facsimile record data obtained from a Doppler Sodar which has been ill operation at Thumba, at a site located close to the Arabian Sea coast. The records from 1983 to 1987 have been taken to observe the typical features of the boundary layer at Thumba. To study the daytime variation of the thermal plume height in relation to surface temperature, 140 clear days in the year 1984 have been chosen. Thermal plume heights were found to peak between 1000 & 1200 IST during January to May 1984, with an exception of April, and from October to December 1984. For the rest of the months, it is seen that the daytime variation does not show any significant peak. The results are discussed III detail.