|
Pneumatic conveying (ver. 2)
Computes, from experimental data, the minimum transport velocityn. |
|
|
| H, D |
m, m |
Column height and diameter. • |
| D, Cv |
m, — |
Diameter of orifice and coefficient
of discharge. • |
| ρair |
g ⁄ L (= kg ⁄ m3) |
Density (volumetric mass d.) of air. • |
| Massair |
kg |
Mass of granulate. • |
| ρapp, ρ |
g ⁄ L, g ⁄ L |
Apparent density and density of granulate. • |
| Δp0 |
|
Pressure difference.
(For data entry, see below.) • |
| Pressure units |
Factor: |
Factor: to convert other to Pa. • |
| Bed height |
m |
Bed height of granulate.
(For data entry, see below.) • |
| Linearize ? |
|
Solve by linearizing the data (log-log). |
| Parameters |
|
Initial (start) NM guess for vmt and
exponent n. • |
| Step |
|
NM steps (scale) for each parameter. • |
| maxite, tol, konvge |
|
Max iterations, tol and
convergence monitoring. • |
| Show values ? |
|
Shows the graph coordinates. |
Computes, from
experimental data in pneumatic conveying, the minimum transport velocity,
vmt (m ⁄ s).
Data for pressure and bed height: supply data in rows or
columns, American or European style, even if separated by tabs
(such as through copy & paste from Excel).
The total residual (discrepancies between the computed
and the experimental data) is minimized via the numerical Nelder-Mead
(NM) algorithm ASA047 [Burkardt, 2007].
The graph shows: (red) the experimental points connected
by a broken line; and (green) the corresponding
computed points. |
| References: |
Plate: PneuConveyingMinVelocity |
• Burkardt, J.,
2007, ASA047
• Wikipedia: Nelder-Mead method
• 1910-10-19:
Chandrasekhar (Chandra), Subrahmanyan
(1995-08-21). |
