(157b) Quantification of Turbulence in Cryogenic Liquid Pool Using High Speed Flow Visualization
AIChE Spring Meeting and Global Congress on Process Safety
2015
2015 AIChE Spring Meeting and 11th Global Congress on Process Safety
15th Topical Conference on Gas Utilization
LNG Plant Safety and Protection II
Tuesday, April 28, 2015 - 4:00pm to 4:30pm
When a cryogenic liquid is released on water, turbulence is generated in the cryogenic liquid pool due to rapid vaporisation. This turbulence is characterized as interfacial turbulence occurring due to thermal convection in water-cryogen interface. The quantification of turbulence in the cryogenic liquid pool, when it comes in contact with water, is an important step in determining the amount of vapor produced from the cryogenic liquid pool. The current study focusses on the measurement of liquid phase turbulence using high speed flow visualization. An experiment is conducted by releasing different amounts of liquid nitrogen instantaneously on water. A high speed camera is operated at a frame speed of 5000 frames/second and a shutter speed of 1/6000 seconds to provide a visual record of the interfacial physics. A frame by frame capture of the advective transport of cryogenic vapor bubble traversing through the liquid is captured and reconstructed using image processing softwares to obtain information on velocity components. The numerical results obtained from image processing are used to determine the turbulence parameters like turbulent intensity, turbulent kinetic energy and eddy dissipation rate. The qualitative results provide information on the wavy structures called ‘thermals’ which is characteristic of turbulent convection. The thermals are found to act as catalyst in increasing heat transfer and turbulence between water and cryogenic pool. In addition to it, the turbulence parameters are found to be dependent on the height of cryogenic liquid. The current study enhances the understanding of the nature of turbulence and its magnitude for implementing in source term modelling of LNG releases on water.
Topics
Checkout
This paper has an Extended Abstract file available; you must purchase the conference proceedings to access it.
Do you already own this?
Log In for instructions on accessing this content.
Pricing
Individuals
2015 AIChE Spring Meeting and 11th Global Congress on Process Safety
AIChE Pro Members | $150.00 |
AIChE Graduate Student Members | Free |
AIChE Undergraduate Student Members | Free |
AIChE Explorer Members | $225.00 |
Non-Members | $225.00 |
15th Topical Conference on Gas Utilization only
AIChE Pro Members | $100.00 |
Fuels and Petrochemicals Division Members | Free |
AIChE Graduate Student Members | Free |
AIChE Undergraduate Student Members | Free |
AIChE Explorer Members | $150.00 |
Non-Members | $150.00 |