Researchers have created computer simulations of interactions between two immiscible fluids—substances that do not mix, like oil and water. This study reveals how these fluids can generate “finger” patterns during interaction when alternately injected. Understanding these interactions is crucial for carbon storage, a key strategy for combating climate change, since carbon dioxide has contributed significantly to global warming.
The term “fluid” here encompasses both gases and liquids that contain carbon dioxide. The study relies on the phenomenon known as Saffman-Taylor instability, which occurs when two fluids of different viscosities interact within a confined space. This results in unique patterns as the less viscous liquid pushes against the thicker one.
An example of this instability can be observed when glue is pulled apart, forming ridges and waterways. In the context of carbon storage, injecting carbon dioxide into underground water can lead to similar instability, which may help to prevent gas from re-entering the atmosphere.
Current efforts in carbon sequestration are expanding, with numerous facilities worldwide, aiming to provide effective methods to mitigate the greenhouse effects of excess carbon dioxide.
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