CFD Online Discussion Forums - void Foam::multiphaseSystem::solve() of multiphaseEulerFoam solver

hi,

within method solve() can be found:

Code:

...

const dictionary& pimpleDict = mesh_.solutionDict().subDict("PIMPLE"); 

...

where mesh_ is

Code:

const fvMesh& mesh_

, a reference to the fvMesh object mesh

and solutionDict() [Return the selected sub-dictionary of solvers if the "select"
keyword is given, otherwise return the complete dictionary.] :

Code:

const Foam::dictionary& Foam::solution::solutionDict() const 

  344 {

  345     if (found("select"))

  346     {

  347         return subDict(word(lookup("select")));

  348     }

  349     else

  350     {

  351         return *this;

  352     }

  353 }

with method found("select") -> ?

and

subDict("PIMPLE") [Find and return a sub-dictionary for manipulation.]

Code:

Foam::dictionary& Foam::dictionary::subDict(const word& keyword)

  617 {

//lookupEntryPtr(...):

//Find and return an entry data stream pointer for manipulation if present otherwise return //NULL. If recursive, search parent dictionaries. If patternMatch, use regular expressions.

  618     entry* entryPtr = lookupEntryPtr(keyword, false, true);

  619 

  620     if (entryPtr == NULL)

  621     {

  622         FatalIOErrorIn

  623         (

  624             "dictionary::subDict(const word& keyword)",

  625             *this

  626         )   << "keyword " << keyword << " is undefined in dictionary "

  627             << name()

  628             << exit(FatalIOError);

  629     }

  630     return entryPtr->dict();

  631 }

I have several quesiton about this:

1A. mesh_ is a reference to the fvMesh which consists of many subobjects. When calling method solutionDict() on mesh_ what is method found("select") actually doing and if it is searching for the word "select" where in fvMesh mesh it is searching for it?

1B. Method solutionDict() : What is exactly meant by the "select" keyword? solutionDict() does not get any input parameters and therefore I assume it is really searched for a dictionary called "select"...

2. Assumed method solutionDict() returns the reference to mesh, hence mesh_ (see line 349 to 351 second code snippet) method subDict("PIMPLE") afterwards searches for a dictionary called "PIMPLE" in fvMesh mesh?

Perhaps I am misinterpreting something here? I hope someone enlightens me :).

greetings
maybee