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GATE BT 2026 | Question: 55

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A packed bed bioreactor with length $1 \text{~m}$ and inside diameter $10 \text{~cm}$ has liquid flowing at an interstitial velocity of $1 \mathrm{~cm} \mathrm{~s}^{-1}$. Given a volumetric flow rate of $0.025 \mathrm{~L} \mathrm{~s}^{-1}$, the void fraction of the packed bed is $\_\_\_\_$. (rounded off to two decimal places)

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