A numerical and experimental investigation of flow maldistribution in a micro-channel heat sink |
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| Authors: | G. Kumaraguruparan R. Manikanda Kumaran T. Sornakumar T. Sundararajan |
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| Affiliation: | aDept. of Mechanical Engg, Thiagarajar College of Engineering, Madurai, 625015, India;bDept. of Mechanical Engg, Indian Institute of Technology Madras, Chennai, 600036, India |
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| Abstract: | A study of flow mal-distribution in U-type micro-channel configuration is presented. Numerical simulations indicate that flow deceleration and associated pressure recovery in the inlet header lead to flow separation and recirculation which cause oscillations in channel-wise mass flow distribution. Increase in flow resistance by decrease in channel depth, width or number of channels or increase in channel length, results in a more uniform distribution. Mal-distribution increases at high flow rate or low viscosity due to the dominance of inertial phenomena. Experiments performed on a 25-channel setup illustrate that small manufacturing variations in channel dimensions introduce random fluctuations in flow distribution. |
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| Keywords: | Micro-channels Mal-distribution Flow separation Inlet header |
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