CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Simple compressed air tank filling

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   July 16, 2013, 17:24
Default Simple compressed air tank filling
New Member
Join Date: Sep 2012
Posts: 1
Rep Power: 0
abduly85 is on a distinguished road
Hello all,
I'm trying to simulate the transient filling process of a compressed air tank.
It's a simple case, the shape is cylindrical (10cm diameter by 20cm deep cylinder with 1cm diameter inlet), initial tank pressure is atmospheric (14.7 psi) and inlet pressure at a constant 60 psi.
I'm having many errors when applying the "pressure-inlet" BC type at the inlet. I can get the simulation running if I apply a "velocity-inlet" BC type, however, my goal is to simulate the air mass flow rate based on the pressure difference between the initial tank pressure (14.7 psi) and the external pressure (60 psi).

What I've done so far:
1- 3D Geometry: Extruded 1/4 of the cylinder due to symmetry. The whole domain is fluid (air) with the inlet being a surface.
2- Meshed using ANSYS Mesher (mesh is coarse for now)
3- Fluent:
- Used density-based
- Turned the energy model on.
- Used the K-E model
- Density Air (materials) selected to be "Ideal Gas"
- BCs: Inlet selected as "pressure inlet" with 70 psi gauge pressure
- Solution Initialization: Since the initial pressure I want is 14.7 psi I selected "Standard Initialization" with 14.7 psi gauge pressure.
- Step size (for now) is 0.01 seconds.

Please let me know if you could help me, I appreciate it.

Attached Images
File Type: jpg Capture.jpg (104.4 KB, 28 views)
abduly85 is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Filling tank with water Bin ANSYS 1 August 21, 2017 07:17
Need Help! High pressure Gas discharge from tank to tank through a pipe superarthur86 FLUENT 2 June 16, 2017 10:22
Example on simple Stirred Vessel@Stirred Reactor@Stirred Tank Miqi Cornholio Siemens 0 August 17, 2009 11:17
Simulating air injecting to water in a tank? Howard Wang Main CFD Forum 6 March 13, 2009 22:32

All times are GMT -4. The time now is 20:21.