Simulation of gas bubbles with gas hydrates rising in deep water

• A bubble fate simulation model was established.
• Transient thermodynamic conditions were involved.
• Hydrate-coated area ratio was introduced to simulate methane bubble longevity.
• The critical bubble radius corresponding to the longest longevity was obtained.

It is essential to evaluate the effect of gas bubbles rising in deep water from the place where thermodynamic conditions are favorable for gas hydrates formation. Considering the bubble surface morphology, a gas bubble fate simulation model was established which integrated bubble hydrodynamics, gas dissolution, the thermodynamic and kinetic stability of gas hydrates. Hydrate-coated area ratio was a key parameter. The model was applied to simulate methane bubbles in 1500–5000 μm radii released at 1000–2000 m in Monterey Bay Canyon and South China Sea. Reliable simulation results were helpful for further research on deep water environment.