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AliDispersionControl: Difference between revisions
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'''Ali's Dispersion Correction''' is a correction to the dispersive behavior of very long waves in a compressible ocean on an elastic Earth. It is intended to be used in lieu of the self-attraction and loading tide prescribed through the [[fort.24 file]]. | '''Ali's Dispersion Correction''' is a correction to the dispersive behavior of very long waves in a compressible ocean on an elastic Earth. It is intended to be used in lieu of the self-attraction and loading tide prescribed through the [[fort.24 file]]. It should be used with the sixth-digit of [[IM]] equal to 3 (fully implicit gravity wave term). | ||
== Version == | == Version == | ||
{{ | {{Version support box|version=55|relation=+|support=tp}} | ||
This is considered a technical preview in version 55. Theoretical work is still ongoing. | This is considered a technical preview in version 55. Theoretical work is still ongoing. | ||
==Controlling Dispersive Behavior== | ==Controlling Dispersive Behavior== | ||
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* <code>Bd</code> the power law exponent. | * <code>Bd</code> the power law exponent. | ||
For the following | For the following equation: | ||
<math>Correction = A_d | <math>Correction = 1 - \frac{Ma^2}{4} - {A_d}H^{B_d}</math> | ||
where Ma is the Mach number (<math>Ma = \frac{\sqrt{gH}}{Cs}</math>) and H is the total water depth. | |||
Latest revision as of 17:46, 10 July 2020
Ali's Dispersion Correction is a correction to the dispersive behavior of very long waves in a compressible ocean on an elastic Earth. It is intended to be used in lieu of the self-attraction and loading tide prescribed through the fort.24 file. It should be used with the sixth-digit of IM equal to 3 (fully implicit gravity wave term).
Version
| ADCIRC version: | ≥ 55 |
| Tech Preview |
This is considered a technical preview in version 55. Theoretical work is still ongoing.
Controlling Dispersive Behavior
The feature is triggered by the presence of the &AliDispersionControl namelist at the bottom of the fort.15 file. Here is an example of how this line is used (the following floats are the default values):
&AliDispersionControl CAliDisp=T, Cs=1500.0, Ad = 0.0050189, Bd = 0.23394/
CAliDisplogical flag to turn Ali's dispersion correction on (F=false by default).Csis the speed of sound in water [m/s] for the Mach number based dispersive correction. Set Cs to a negative value to turn the Mach number based correction off.Adthe power law constant.Bdthe power law exponent.
For the following equation:
where Ma is the Mach number () and H is the total water depth.
