A jacketed vaporiser is used to produce vapour from a liquid feed. A liq$($b$)$ A jacketed vaporiser is used to produce vapour from a liquid feed. A

liquid feed enters the vaporiser at the bottom with a volumetric flow rate

$F_i$ and temperature $T_i,$ and the produced vapour is taken out from the

top. Steam is supplied from an external source as a heating medium.

Develop a model that describes the time$-$dependent liquid holdup in the

vaporiser. The development should include:

$($i$)$ a labelled schematic diagram,

$(2$ marks$)$

$($ii$)$ a list of characterising variables,

$(3$ marks$)$

$($iii$)$ a list of assumptions,

$(3$ marks$)$

$($iv$)$ conservation and constitutive equations with any initial and

boundary conditions needed.

$(12$ marks$)$uid feed enters the vaporiser at the bottom with a volumetric flow rate F$\_$i and temperature T$\_$i$,$ and the produced vapour is taken out from the top. Steam is supplied from an external source as a heating medium. Develop a model that describes the time$-$dependent liquid holdup in the vaporiser. The development should include: