Conveners
C2Po1F - Heat Transfer
- Bryant Mueller (University of Wisconsin - Madison)
- Ali Kashani (Atlas Scientific)
This work describes the methods for transporting cryogens through single- or multichannel pipelines. It also presents examples of the use of cryogenic lines and of their designs, referring in detail to typical structural nodes found in cryogenic pipelines. The second principle of dynamics and the Gouy-Stodola theorem are discussed from the perspective of their application in optimizing and...
Multiple bubble interaction in initially quiescent liquid, under certain conditions, is accompanied by the generation of jets, shockwaves, and light. At cryogenic temperature (< 123 K) when certain materials become brittle, such afore-mentioned physical effects can be effective in disintegrating them to smaller fragments under controlled erosion. The spatial and temporal-scales of such...
To study the dynamically changing interfacial structures due to the collapse of the cavitating bubble, and the mechanism whereby forces large enough to cause damage are brought to bear against a rigid wall is of great importance in the study of cavitation induced erosion, and, still somewhat obscure in cryogenic liquids. Study of individual collapsing bubbles and resulting microjet during the...
Storage of cryogenic propellants in rocket fuel tanks gives rise to an undesirable phenomenon called thermal stratification. Large temperature difference between the cryogen and ambient results in significant heat leakage into the tank. The liquid near the walls heat up and flow to the interface due to natural convection giving rise to an axial temperature gradient inside the tank. Maintaining...
With the growing concern of environment problems, there are urgent demands for environment-friendly refrigerants in the refrigeration industry. As a natural refrigerant, Methane (R50) has zero ozone depletion potential and quite low global warming potential. What’s more, it is also the major cryogenic refrigerant of the Mixture Joule-Thomson Refrigeration cycle (MJTR). Therefore, accurate...
Computational simulations of superfluid helium are needed in order to improve the design of the cooling system of superconducting magnets in particle accelerators and to achieve a better understanding of the transient phenomena during magnet quenches. A conjugate heat transfer numerical model based on the C++ toolbox OpenFOAM is implemented to three-dimensional case studies involving...
