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*FLUID-IN
Data format:
An arbitrary number of lines with 4 values each, as follows:
IRSI IFSG ITOP PTOTP
...
Status:
Required when elements are defined with *RIGIPRO
Purpose:
To define the properties if an internal fluid along a riser
Restriction:
A rigid riser IRIS must have been previously defined with *RISER.
Details :
| Parameter | Description |
|---|---|
| IRSI | Identification number of the set of elements defining a rigid riser |
| IFSG | Internal Fluid Specific Gravity (if not present or negative, value is 1) |
| ITOP | Top node number (must have been previously defined) below which internal hydrostatic pressure will be calculated using the internal fluid specific gravity IFSG (if not present, value is free surface) |
| PTOP | Top node pressure (if not present, value is 1.e+5 N/ m2.) [N/ m2] |
Notes : In case of internal specific gravity variation, up to five triplets (IFSG,ITOP,PTOP) may be defined for the same riser
Example :
*FLUID-IN
c[.] [.] [.] [N/m2]
1 1.5 10 1.e+5
1 2 15 0
For \(z>z_1 ~~~~~~~~~~~~~~~~~ P = P_1\)
\(z_1>z>z_2 ~~~~~~~~~~~~~~~~~ P = P_1 + \rho_1 g(z_1-z)\)
\(z_2>z ~~~~~~~~~~~~~~~~~ P = P_1 + \rho_1 g(z1-z2) + P_2 + \rho_2 g(z2-z)\)
