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- W18019871 abstract "A qualitative study of the flow patterns in an underground-coal-gasification laboratory flow model has identified a mechanism for oxygen transport. The injected fluid is drawn directly to the cavity walls in a thin layer along the cavity's floor, with the difference in density between the injected fluid and the bulk fluid being the primary cause of this stratified flow. The model was made dynamically similar to a UCG system by equating the Grashoff and Reynolds numbers for the two systems. With water as the model fluid, equating the Grashoff numbers resulted in a 0.20 scale factor for the model, while equating the Reynolds numbers set the injection rate for the model. Although the operating conditions were varied over a significant range, the general shape of the flow pattern remained unchanged. The injected fluid impacted the floor of the cavity, flowed radially outward toward the walls in a thin layer on the floor, was drawn up past the cavity walls, and then backmixed in the cavity before being swept out toward the exit. The injected fluid arriving at the cavity wall was thus almost completely undiluted by the bulk fluid." @default.
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- W18019871 date "1982-01-01" @default.
- W18019871 modified "2023-09-27" @default.
- W18019871 title "Discovery of a mechanism for oxygen transport during UCG. [Underground coal gasification]" @default.
- W18019871 hasPublicationYear "1982" @default.
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