This study examines the effects of contact angle, surface tension, and heat flux on bubble growth rate, bubble departure time, and bubble departure radius using a comprehensive numerical simulation approach. The study uses a computational fluid dynamics (CFD) approach based on volume of fluid (VOF) to capture the dynamic behavior of the liquid-vapor interface during boiling. The simulations provide significant information on the mechanisms that control the boiling process by varying the contact angle, surface tension, and heat flux. According to the findings, slower bubble growth leads in bubbles taking longer to reach their maximum size. Additionally, longer time intervals before bubbles detach are a result of increasing surface tension. The simulations also show that heat flux has an impact on the size of the bubbles that detach as well as the time it takes for them to do so. Higher heat fluxes hasten bubble detachment, resulting in a reduction in bubble size and detachment time. These findings offer crucial knowledge for heat transfer system design and optimisation, enhancing boiling heat exchangers and cooling mechanisms across several sectors. The information gained from this inquiry creates possibilities for more effective temperature control and better heat transmission.

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Numerical Investigation of Bubble Dynamics During Nucleate Pool-Boiling

  • Monaksh Nayak,
  • Neeraj Kumar,
  • Aaditya Rawat,
  • Ram Dayal

摘要

This study examines the effects of contact angle, surface tension, and heat flux on bubble growth rate, bubble departure time, and bubble departure radius using a comprehensive numerical simulation approach. The study uses a computational fluid dynamics (CFD) approach based on volume of fluid (VOF) to capture the dynamic behavior of the liquid-vapor interface during boiling. The simulations provide significant information on the mechanisms that control the boiling process by varying the contact angle, surface tension, and heat flux. According to the findings, slower bubble growth leads in bubbles taking longer to reach their maximum size. Additionally, longer time intervals before bubbles detach are a result of increasing surface tension. The simulations also show that heat flux has an impact on the size of the bubbles that detach as well as the time it takes for them to do so. Higher heat fluxes hasten bubble detachment, resulting in a reduction in bubble size and detachment time. These findings offer crucial knowledge for heat transfer system design and optimisation, enhancing boiling heat exchangers and cooling mechanisms across several sectors. The information gained from this inquiry creates possibilities for more effective temperature control and better heat transmission.