extremely low residuals
 

Hi,
I am doing an FSI simulation of flow through a micro pore(in a tissue engineering cartilage). The problem is that the residuals are very low of the order of 10 raised to -21 and they converge in the first iteration itself. when i view the result I find the velocity also too small of the same order(10 raised to -21) and this isnt what I am expecting.
My simulation setup is as follows - I have a cube made of the scaffold material(youngs modulus .1 MPa) Inside the cube there is spherical pore filled with water with two openings to two sides of the cube. I apply a linear pressure on one face of the cube from 0 to 4000Pa. The opposite face is constrained by a fixed support.
Please help me with this
Ranjith

Hi,
check the dimensions of the fluid and solid domains. I had the same problem when my fluid model was specified in [mm] and my solid in [m], i.e. 1000 times bigger.

Lance

Could also be because you have the units wrong on the driving function. Could also be your timestep is far too small (this is unlikely). But most probably it is a setup error.