Abstract
The potential of using a full shield or partial shield with a guide plate to control the bypass cooling air flowing above a heat sink is numerically modeled using two different scenarios of inlet conditions – fixed mass flow rate and specified fan curve. Excellent agreement is observed when the simulation results are compared with available experimental data in the literature. Under the first inlet condition, the Nusselt numbers associated with the full shield installation are significantly higher than those without a shield, but with a significant pressure drop penalty. Friction factor increases with partial shield height till it reaches a maximum value with the full-shield configuration. Using an inclined guide plate with a partial shield alters the flow direction, forcing the air to impinge on the heat sink. This adds an extra cooling effect but without causing a considerable increase in the friction factor.
| Original language | English |
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| Pages (from-to) | 948--958 |
| Journal | International Journal of Heat and Mass Transfer |
| Volume | 134 |
| State | Published - 2019 |