PO.SCAL.BrooksCorey.Sw
Description
Brooks-Corey saturation from capillary pressure, [fraction]. Inverse of Pc function.
Syntax
=PO.SCAL.BrooksCorey.Sw(Pc, Swi, Pd, lambda)Parameters
| Parameter | Description |
|---|---|
| Pc | Capillary pressure, [psi]. |
| Swi | Irreducible water saturation, [fraction]. |
| Pd | Displacement (entry) pressure, [psi]. |
| lambda | Pore size distribution index, [dimensionless]. |
SI Unit Version
Lambda Name
PO.SCAL.BrooksCorey.Sw.SIFormula
=LAMBDA(Pc, Swi, Pd, lambda, LET(
Pc_psi, PO.UnitConverter(Pc, "kPa", "psi"),
Pd_psi, PO.UnitConverter(Pd, "kPa", "psi"),
PO.SCAL.BrooksCorey.Sw(Pc_psi, Swi, Pd_psi, lambda)))SI Parameters
| Parameter | Unit | Description |
|---|---|---|
Pc |
kPa | Capillary pressure, [kPa] |
Swi |
- | Irreducible water saturation, [fraction] |
Pd |
kPa | Displacement (entry) pressure, [kPa] |
lambda |
- | Pore size distribution index, [dimensionless] |
How to save as a reusable Excel function
LAMBDA is a built-in Excel feature (Microsoft 365) that lets you create custom functions without VBA. The formula above works as-is when pasted into a cell.
To save a LAMBDA as a reusable named function:
- Go to Formulas → Name Manager → New
- Enter a name, e.g.
PO.SCAL.BrooksCorey.Sw.SI - In Refers to, paste the LAMBDA formula without the trailing invocation
(...) - Click OK
Now use =PO.SCAL.BrooksCorey.Sw.SI(...) anywhere in your workbook.