Location

London

Event Website

http://www.csce2016.ca/

Description

Tornado is a complex flow structure, where high swirling flow closer to the ground converges to the center and then moves upward. As a result, it creates a high suction pressure at the ground near the center of the tornado. The main objective of this study is to analyse the impact over flow structure and ground pressure by implementing topographical changes. For the present study a one-celled tornado replicating a real EF-2 scale has been chosen. Previous study suggests that suction ground pressure is highest at the tornado core center, also it changes more sharply near the core center. As a result, the authors decided to raise the surface in the form of a hill at the tornado core center. In this study, two different types of hill based on their slope are implemented for analysing the impact of two different types of topographical changes. It has obtained that as the slope becomes steeper the peak speed up value increases. Also, unlike the synoptic flow case, maximum speed up does not occur at the crest of the hill. Presence of the hill hardly has any impact on the overall pressure distribution at the ground.


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Jun 1st, 12:00 AM Jun 4th, 12:00 AM

NDM-557: COMPUTATIONAL MODELING OF HILL EFFECTS ON TORNADO LIKE VORTEX

London

Tornado is a complex flow structure, where high swirling flow closer to the ground converges to the center and then moves upward. As a result, it creates a high suction pressure at the ground near the center of the tornado. The main objective of this study is to analyse the impact over flow structure and ground pressure by implementing topographical changes. For the present study a one-celled tornado replicating a real EF-2 scale has been chosen. Previous study suggests that suction ground pressure is highest at the tornado core center, also it changes more sharply near the core center. As a result, the authors decided to raise the surface in the form of a hill at the tornado core center. In this study, two different types of hill based on their slope are implemented for analysing the impact of two different types of topographical changes. It has obtained that as the slope becomes steeper the peak speed up value increases. Also, unlike the synoptic flow case, maximum speed up does not occur at the crest of the hill. Presence of the hill hardly has any impact on the overall pressure distribution at the ground.

http://ir.lib.uwo.ca/csce2016/London/NaturalDisasterMitigation/38