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sprayFoam droplet-wall interaction Heat Transfer Problem

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Old   September 21, 2018, 07:19
Default sprayFoam droplet-wall interaction Heat Transfer Problem
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Sagar
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Hello,

I am trying to simulate spray mist cooling of hot plate which is at constant temperature 1073K. Injected water droplet is at 303K and surrounding air is also at 303K.

I am using sprayFoam to simulate this case. I have used following thermal spray models with coneNozzleInjection is used.

heatTransferModel --> RanzMarshall
phaseChangeModel --> liquidEvaporationBoil
atomizationModel --> LISA

Radiation is off.

Now, Problem is when water droplets hits the hot plate(wall), they should be heated up. But in current case setup, temperature of droplets decreased by 4 to 5 degree instead of heated up.

I can not understand why it happens? I am very close. can anybody help?

I am attaching configuration and droplet temperature.
Attached Images
File Type: jpg droplet.jpg (68.4 KB, 41 views)
File Type: jpg velocity field.jpg (46.7 KB, 26 views)
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