Hydrostatic pressure

Klavoir · September 29, 2021, 08:20

Hello,

How can I make hydrostatic pressure visible in the results of Fluent?
I have a watertank, no energy model, constant density, in which I want to visualize the hydrostatic pressure. I activated gravity, set the operation pressure at zero and defined the location of the operation pressure near the top of the tank. But when I look at the absolute pressure no pressure gradient in vertical direction is visible. What am I doing wrong?

LuckyTran · September 29, 2021, 16:04

You're not doing anything wrong. The gauge pressure field that Fluent solves for doesn't contain any hydrostatic pressure. I know no one reads documentation or does tutorials anymore, but this topic is covered in the first set of tutorials. It's not a bug, it's a feature.

The most straightforward way is to create a custom field function and add the hydrostatic pressure to the static pressure field and then visualize this field.

September 29, 2021, 08:20	Hydrostatic pressure	#1
Klavoir New Member Join Date: Sep 2021 Posts: 22 Rep Power: 4	Hello, How can I make hydrostatic pressure visible in the results of Fluent? I have a watertank, no energy model, constant density, in which I want to visualize the hydrostatic pressure. I activated gravity, set the operation pressure at zero and defined the location of the operation pressure near the top of the tank. But when I look at the absolute pressure no pressure gradient in vertical direction is visible. What am I doing wrong?

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September 29, 2021, 16:04		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,676 Rep Power: 66	You're not doing anything wrong. The gauge pressure field that Fluent solves for doesn't contain any hydrostatic pressure. I know no one reads documentation or does tutorials anymore, but this topic is covered in the first set of tutorials. It's not a bug, it's a feature. The most straightforward way is to create a custom field function and add the hydrostatic pressure to the static pressure field and then visualize this field.