TELEMAC-MASCARET Forum: initial conditions (1/1)

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TOPIC: initial conditions

initial conditions 6 years 5 months ago #30419

merlo

Hi
I found in the tutorials that they choose to the boundaries open boundary with prescribed H and open boundary with prescribed Q
But in the case file we introduce them like that
/

/ BOUNDARY CONDITIONS
/

/
PRESCRIBED FLOWRATES : 0.;50.
PRESCRIBED ELEVATIONS : 200;0.

How do you know which boundary is first and which one is the second third etc if there is more than one liquid boundary

And in the case of adding tpxo we add the ketword
INITIAL CONDITIONS = 'TPXO SATELLITE ALTIMETRY'
Does that replace them ?

Sorry for my stupid questions
regards
Martin

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initial conditions 6 years 5 months ago #30420

c.coulet OFFLINE Moderator Posts: 3722 Thank you received: 1031	Hi Initial condition and boundary condition are two different things... So TPXO initial condition couldn't replace some values in the boundaries. For the boundaries, the order is the one existing in the boundary condition file... Regards
	Christophe The administrator has disabled public write access. The following user(s) said Thank You: merlo

initial conditions 6 years 5 months ago #30429

merlo	Thank you for replying I have another question that might seem stupid to you How do we determine the flow direction (the upstream and the downstream) . Is it automatically determined by adding tide xith tpxo ?
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initial conditions 6 years 5 months ago #30434

c.coulet OFFLINE Moderator Posts: 3722 Thank you received: 1031	Hi If you choose to apply TPXO boundary condition, you have to select the boundary on which TPXO will be applied. There is a keyword for that. Regards
	Christophe The administrator has disabled public write access. The following user(s) said Thank You: merlo

initial conditions 6 years 5 months ago #30441

merlo

Thank you so much
One last question
If we know the elevation in one boundary and the flowrate in another one and prescribe them that way :

PRESCRIBED FLOWRATES : 0.;50.
PRESCRIBED ELEVATIONS : 200;0

Doesn't that mean that we assume that the flowrate in the first boundary and the elevation in the second boundary are equal to 0 ? Because it's not what i want. I want to describe the boundaries by mentionning the informations i know (dlowrate in one qnd elevation in the other one)

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initial conditions 6 years 5 months ago #30443

c.coulet OFFLINE Moderator Posts: 3722 Thank you received: 1031	No, the zero is not used. Just here because each field should have as many values than the number of liquid boundaries... Regards
	Christophe The administrator has disabled public write access.