PO.SCAL.BrooksCorey.Pc
Description
Brooks-Corey capillary pressure, [psi]. Pc = Pd × Se^(-1/λ).
Syntax
=PO.SCAL.BrooksCorey.Pc(Sw, Swi, Pd, lambda)Parameters
| Parameter | Description |
|---|---|
| Sw | Water saturation, [fraction]. |
| Swi | Irreducible water saturation, [fraction]. |
| Pd | Displacement (entry) pressure, [psi]. |
| lambda | Pore size distribution index, [dimensionless]. Typical 0.5-6. |
SI Unit Version
Lambda Name
PO.SCAL.BrooksCorey.Pc.SIFormula
=LAMBDA(Sw, Swi, Pd, lambda, LET(
Pd_psi, PO.UnitConverter(Pd, "kPa", "psi"),
result_psi, PO.SCAL.BrooksCorey.Pc(Sw, Swi, Pd_psi, lambda),
PO.UnitConverter(result_psi, "psi", "kPa")))SI Parameters
| Parameter | Unit | Description |
|---|---|---|
Sw |
- | Water saturation, [fraction] |
Swi |
- | Irreducible water saturation, [fraction] |
Pd |
kPa | Displacement (entry) pressure, [kPa] |
lambda |
- | Pore size distribution index, [dimensionless]. Typical 0.5-6 |
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.Pc.SI - In Refers to, paste the LAMBDA formula without the trailing invocation
(...) - Click OK
Now use =PO.SCAL.BrooksCorey.Pc.SI(...) anywhere in your workbook.