[shaswat]

Dear friends

I am doing Transient analysis.The flow is in the z direction in a flexible porous pipe.

model inlet condition : pressure(t),
outlet: Mass flow rate

I have data as shown below

t=0s, p= 130mmHg
t=0.1s , P= 135mmHg

and so on. No other data I have.

I need to set Global initial conditions on fluid domain and porous domain.

I set the initial conditions in the fluid domain as shown below :



static pressure> Option>Automatic value with value>Relative pressure = 130 mm Hg


Is it correct?

I set velocity U=0m/s, V=0m/s , W= 0.4m/s (for example)

similarly I need to set initial conditions in the porous domain.

Kindly help me to set the initial conditions.

I set U=0 m/s , V=0m/s , W=0 m/s

static pressure> Option>Automatic value with value>Relative pressure = ?


Is the pressure is same as 130 mm Hg or 0 ?

Kindly help me to proceed my simulations


Thank you


Regards

Govind

[ghorrocks]

What mass flow do you have at the outlet?

[shaswat]

Originally Posted by ghorrocks

What mass flow do you have at the outlet?

Mass flow rate = 2.08x10^-3 kg/s
My outlet dia= 2.5mm
I am expecting flow 1.96ml/s at the outlet


Thank you

Regards

Govind

[ghorrocks]

So you have a constant flow rate leaving the domain with a variable pressure being applied? This sounds unusual. Is the fluid compressible or incompressible?

I have no idea what you are modelling so cannot comment on whether it is sensible or not - but so far it sounds strange.

[shaswat]

Originally Posted by ghorrocks

So you have a constant flow rate leaving the domain with a variable pressure being applied? This sounds unusual. Is the fluid compressible or incompressible?

I have no idea what you are modelling so cannot comment on whether it is sensible or not - but so far it sounds strange.

it is incompressible flow in a artery . it is an average flow in one cardiac cycle.

[ghorrocks]

In that case this is likely to be a FSI simulation.

Are you having any problems in running this? What is your question?

[shaswat]

Originally Posted by ghorrocks

In that case this is likely to be a FSI simulation.

Are you having any problems in running this? What is your question?

My question is

1. I consider arterial wall as porous domain. What is the initial condition in the wall domain?


Thank you

Regards

Govind