In a two-phase system where the continuous phase remains in place, the gas hold up can be expressed as (where Vₛ and Vₜ are the superficial gas velocity and bubble rise velocity)

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In a two-phase system where the continuous phase remains in place, the gas hold up can be expressed as (where Vₛ and Vₜ are the superficial gas velocity and bubble rise velocity) Answer: H = Vₛ/(Vₛ+ Vₜ)

Question context

This question is part of ⚗️ Biochemical Engineering within the broader 🧬 Medical Science subject and appears in the DemoPaper-Pakistan preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.