[boffin5]

Hi,
Currently I am trying to learn how to simulate airflow through car radiators. There is a tutorial in v2012 called simpleCar which addresses this. btw, I previously posted a thread, "trouble running simpleCar case" which referred to one of the issues. But what I really need is an explanation of the methodology and parameters that are associated with defining a heat exchanger, as used in this tutorial.


For example, one of my questions regards the definition of the 'airIntake'. I have attached a powerpoint file that shows an image from paraView. It shows how a small portion of the radiator ducting has been captured by a box, and is assigned a face name, 'airIntake'. Why only a small part of the ducting, and does it matter which part of the ducting it comes from? Is 'airIntake' hard coded terminology, or could it be called 'ducting'?


Another one regards the intake definition in 0/U, which follows:

dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (10 0 0);

// Surface normal with time ramping
intakeType1
{
    type            surfaceNormalFixedValue;
    refValue        uniform 1.2;
    ramp            table ((0 0) (10 1));
}

// Uniform surface normal with Function1 for ramping
intakeType2
{
    type            uniformNormalFixedValue;
    uniformValue    table ((0 0) (10 1.2));
}

// Uniform surface normal with time ramping
intakeType3
{
    // Or directly with uniform value (ramping also possible)
    type            uniformNormalFixedValue;
    uniformValue    constant 1.2;
    ramp            table ((0 0) (10 1));
}

Honestly, this is all indecipherable to me at this point.


If anyone is familiar with this tutorial and/or simulating airflow through heat exchangers, I would appreciate some help/directions to an information source.