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Missing water flow in sub-inlets

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Old   February 17, 2020, 13:42
Default Missing water flow in sub-inlets
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Dyuthi
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Hi all! I am trying to simulate this system where cold water enters a main inlet manifold which feeds into multiple smaller rectangular channels which get collected at the bottom manifold and exits the system (essentially a simplified box-frame solar thermal collector-pic attached). While checking the results I figured that the water seems to enter only a few channels (pic of velocity streamline included). Is there anything I can do to ensure the water enters all the channels?
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Old   February 17, 2020, 16:11
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Streamlines are not a reliable way to work out how much fluid is going though each passage. I will let you work out why

You should generate a cross section plane through the passages and look at the normal velocities. Even better, generate a plane for each passage and use the massflow() function to give the exact flow in each passage.
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Old   February 18, 2020, 04:35
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Thanks for the suggestion. I generated the cross section plane and the velocity is zero in the channels where water does not enter. So is there any way I can ensure water enters these chanels?
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Old   February 18, 2020, 05:11
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Have a look at the pressure across your device. Here's a hint: If a channel has no pressure gradient along it then it will have no flow.
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