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SED2D-WES Version 4.3 Beta

**TZ CARD**

**COMPUTATION TIME CONTROL**

**TZ CARD**

**Required**

**Field**

**Variable**

**Value**

**Description**

0,C1-2

IC1

TZ

Card group identifier

≥0

3

NTTS

Maximum number of cycles

<0

Default = 0

≥0

1

DT

Length of a time step for SED2D-WES simulation (decimal

hours). **Note: **The capability exists to specify a time step

that is different from the RMA2 time step when using a

dynamic RMA2 solution file. However, this is **NOT**

**RECOMMENDED. **If the SED2D time step is less than

the RMA2 time step then a linear interpolation will be

performed to evaluate the velocities at the intermediate time

steps. The SED2D time step cannot be larger than the

RMA2 time step. **WARNING: It is highly recommended**

**that the SED2D time step be set exactly equal to the**

**RMA2 time step. **Severe accuracy errors can result from

using an interpolated flow field.

<0

Default = 0.0

≥0

2

TMAX

Maximum time for a simulation (decimal hours)

<0

Default = 0.0

≥0

4

DT_REPEAT

Time increment for RMA2 solution file rewind (decimal

hours). When using a repeating hydrodynamic solution

(such as a repeating tide or a steady state hydrodynamic

solution) the time increment between the last time step in

the RMA2 solution file and the first time step of the

rewound RMA2 solution file must be specified. For steady

state hydrodynamics let DT_REPEAT = TMAX to avoid re-

reading the RMA2 file every time step.

<0

Default = DT

76

*WORKING DRAFT*