Download presentation

Presentation is loading. Please wait.

1
**Free Convection in a Light Bulb**

2
**Free Convection in a Light Bulb**

The model solves for the temperature distribution and the flow field inside a light bulb Axisymmetric model, accounts for conduction, convection, radiation and nonisothermal flow Model shows how to model free convection, how to treat ideal gasses, and how to model radiation

3
**Free Convection in a Light Bulb**

Tungsten filament approximated with a solid torus to allow modeling in 2d Surface-to-surface radiation at interior boundaries Surface-to-ambient radiation at outer boundaries

4
**Free Convection in a Light Bulb**

Argon gas treated as an ideal gas When the light is turned on, the gas heats and induces a flow

5
**Free Convection in a Light Bulb**

The filament heats rapidly over the first seconds Pictures shows temperature over the first 10 seconds t=2s t=6s t=10s

6
**Free Convection in a Light Bulb**

Induces a flow driven by natural convection Pictures shows velocity field over the first 10 seconds t=2s t=6s t=10s

7
**Free Convection in a Light Bulb**

Temperature on the boundary heats slowly

8
**Free Convection in a Light Bulb**

Radiative heat flux on the outer boundary

9
**Free Convection in a Light Bulb**

Similar presentations

OK

Issues and Needs in Solar Modeling James A. Klimchuk Rebekah M. Evans NASA/GSFC.

Issues and Needs in Solar Modeling James A. Klimchuk Rebekah M. Evans NASA/GSFC.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on review of related literature Ppt on brushless servo motor Ppt on overhead service connection Ppt on depth first search algorithm java Ppt on computer graphics applications Ppt on computer malwares software Ppt on vehicle testing Ppt on automobile related topics on personality Ppt on air pollution for class 11 Project ppt on job rotation