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if (timestep X == true) OR if (current_timestep == timestep X)

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Old   March 14, 2014, 09:43
Default if (timestep X == true) OR if (current_timestep == timestep X)
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hi,

I need to implement specific code for specific timesteps. Therefore I though about doing something like

Code:
if (timestep X == true) {...}
OR if

Code:
(current_timestep == timestep X) {...}
Does someone know how I can do so?

greetings
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Old   March 14, 2014, 10:32
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Hi again,

I found

Code:
scalar deltaTValue	() const inline
//Return time step value.
and

Code:
Foam::label timeIndex	() const
//Return current time index.
and

Code:
Foam::dimensionedScalar deltaT	() const
//Return time step.
I guess the first one will give me the whole value of the time step, e.g. 5 Seconds, right?
But what about the second and the third one? Which one will just give me the number of timesteps including the actual running time step?
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Old   March 14, 2014, 12:45
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Marco A. Turcios
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Since this sounds like you are doing it in a solver, runTime.value() is your friend.
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Old   March 14, 2014, 14:26
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Quote:
Since this sounds like you are doing it in a solver, runTime.value() is your friend.
Thx, for the help. Just to be sure: runTime.value() will return the following values:

first time loop pass: 0
second time loop pass: 1
third time loop pass : 2
and so on

?
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Old   March 14, 2014, 14:28
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So you want the condition to run when t = a certain value, or dt = a certain value? I may have misunderstood your initial question.
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Old   March 14, 2014, 16:07
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Quote:
So you want the condition to run when t = a certain value, or dt = a certain value? I may have misunderstood your initial question.
I want to do something like:

Code:
if (time loop pass == 1)
{

}

if (time loop pass == 2)
{

}
.
.
.
Sure, I can do this without using any members of class Time, but I thought if Time provides such a member it would be better to use it.

Last edited by maybee; March 14, 2014 at 17:51.
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Old   March 17, 2014, 03:30
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I think the confusion is about what sort of 'time' you want to measure.

Within a solver, runTime.value() will return the 'real', physical time, in seconds.
If you want to count the number of iterations of your code, a counter might be a better bet?

runTime.value() will return these values if your deltaT is 1 second per iteration.
Quote:
Originally Posted by maybee View Post
first time loop pass: 0
second time loop pass: 1
third time loop pass : 2
and so on
?
Although actually, the solvers that I've looked at mostly start with a runTime++; , so they'd return 1 as the first time value if dt = 1 and you took it after that line
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Old   March 17, 2014, 04:52
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hi,

thx for the reply. I ve taken an own counter now. This should work fine for me . As I already told - just wanted to check if class Time or any other class already proivdes such a counter.

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