Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
2D balloon being inflated with liquid, inside pipe
Posted 18 avr. 2026, 11:24 UTC−4 Computational Fluid Dynamics (CFD), Studies & Solvers, Structural Mechanics Version 6.3 2 Replies
Please login with a confirmed email address before reporting spam
Hello!
I'm very new to COMSOL so I can only ask this question in simple terms.
I have a 2D cross-section of a circular balloon thats filled with liquid, the balloon is inside a rigid pipe that's marginally larger in diameter than the balloon and has some irregularities across the surface, and the pipe itself is also filled with a liquid. What is the simplest/most lightweight method of simulating the balloon expanding from a uniform inflow of more liquid/uniform increase in pressure, until it is pressing against the pipe and deforming around the irregularities?
Eventually I'd also like to divide the balloon into four quadrants with interior walls of the same material. Could I apply the same method to that case too?
Please login with a confirmed email address before reporting spam
Hi,
This application example might help:
https://www.comsol.com/model/inflation-of-a-spherical-rubber-balloon-12599
Magnus Ringh, COMSOL
Please login with a confirmed email address before reporting spam
Hi,
This application example might help:
Magnus Ringh, COMSOL
Thank you, Magnus! That example is exactly where I want to end up, eventually. However, I don't have the skills to work my way backwards from a "complete" simulation to a simplistic/skeletal one, which is all I dare to attempt right now. Do you have any recommendations on how to break down your example to the bare necessities of simulating the case?
/Felix
