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Dispersed Flow Models Lesson-1

This lesson covers the concept of dispersed flow models in gas-liquid two-phase flow. It explains the applicability of these models, the force balance across a bubble, and how to calculate the terminal velocity of a bubble. The lesson also discusses how to find out the velocity-based diameter in the slug regime bubbly flow and how to evaluate bubbly flow statistically in terms of volume and number density ratio. It further delves into the motion of a single bubble in an unconstrained domain, the effect of internal dynamics of the gaseous mass on terminal velocity, and the size distribution in the cross-section of a tube. The lesson concludes with a practical example of calculating the probability of getting a 2mm diameter particle in a random selection.

Video Highlights

01:12 - Discussion on dispersed flow and its applicability.
04:05 - Terminal velocity of a bubble considering internal dynamics.
16:30 - Size distribution and number distribution of bubbles in a bubbly flow.
20:30 - Calculation of mean diameter in bubble mass

Key Takeaways

- Dispersed flow models are applicable in gas-liquid two-phase flow.
- The force balance across a bubble and the terminal velocity of a bubble can be calculated.
- The velocity-based diameter in the slug regime bubbly flow can be determined.
- Bubbly flow can be evaluated statistically in terms of volume and number density ratio.
- The motion of a single bubble in an unconstrained domain can be understood.
- The effect of internal dynamics of the gaseous mass on terminal velocity can be analyzed.
- The size distribution in the cross-section of a tube can be studied.