Abstract
Mushy zone constant is an important parameter of the enthalpy-porosity method which defines how the flow evolves within the cavity. The present numerical study investigates the effect of mushy zone constant (C = 1 × 104, 1 × 106 & 1 × 108 kg m−3 s−1) on the melting phenomena of a phase change material (PCM) under hyper-gravity conditions (2g, 5g, 10g and 20g). Value of ‘C’ influences the fluid velocity within the liquid region of PCM and its mobility during phase change process. The melting rate is enhanced by 32% as value of ‘C’ is reduced from 1 × 108 to 1 × 104 at normal gravitational conditions while heat transfer rate at hot wall improves as value of ‘C’ is decreased from 1 × 108 to 1 × 104 with maximum discrepancy being 83%. Under the combined effect of value of ‘C’ and hyper-gravity, the movement of liquid region within the cavity becomes distinct in comparison to the normal gravity condition. The melting rate is enhanced by 74% at ‘C’ = 1 × 104 & by 54% at ‘C’ = 1 × 104 as the convection within the liquid region also enhances.
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