Date of Award


Degree Type


Degree Name

Master of Engineering Science


Mechanical and Materials Engineering


Dr. Eric Savory


Large eddy simulations have been used to compare the near surface outflow of the commonly used transient impinging jet to that of the physically realistic cooling source downburst model. This has shown that the transient impinging jet is incapable of capturing the buoyancy driven features of an actual downburst, due to its non-physical forcing parameters. The non-dimensional vorticity term for the impinging jet, representative of the relative contribution of the ring vortex to the near surface outflow, differs by at least 56% to that for the cooling source model. The cooling source model has also been used to compare the outflow of a downburst line, where multiple downbursts occur simultaneously, to that of an isolated event. This has shown that speed-up factors of up to 1.55 can be expected and that total damaging surface area can increase by up to 82% for a two event downburst line.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.