[NewKid]

Hi, everyone.
To investigate the interactions between the gas and the injected liquid, I just modified one turbulence model source file. In this source file, I must read every parcel of the spray cloud to calculate the interaction. Therefore, lookupObject function may be called as follows.
const basicSprayCloud & cloud = (this->mesh_.objectRegistry.template lookupObject<basicSprayCloud>("sprayCloud"));
Anyway, the compiling message says:
error: reference to 'Foam::SprayCloud<Foam::ReactingCloud<Foam::Thermo Cloud<Foam::KinematicCloud<Foam::Cloud<Foam::Spray Parcels<Foam::ReactingParcel<Foam::ThermoParcel<Fo am::KinmaticParcel<Foam::Parcel>>>>>>>>>::typeName is ambiguous'
where basicSprayCloud and sprayCloud are declared in createClouds.H as follows:
Info<<"\nConstructing reacting cloud" << endl;
basicSprayCloud parcels
(
"sprayCloud",
rho,
U,
g,
slgThermo
);
So how to call lookupObject function properly to get the sprayCloud in turbulence model (k function)?

[massive_turbulence]

Originally Posted by NewKid

Hi, everyone.
To investigate the interactions between the gas and the injected liquid, I just modified one turbulence model source file. In this source file, I must read every parcel of the spray cloud to calculate the interaction. Therefore, lookupObject function may be called as follows.
const basicSprayCloud & cloud = (this->mesh_.objectRegistry.template lookupObject<basicSprayCloud>("sprayCloud"));
Anyway, the compiling message says:
error: reference to 'Foam::SprayCloud<Foam::ReactingCloud<Foam::Thermo Cloud<Foam::KinematicCloud<Foam::Cloud<Foam::Spray Parcels<Foam::ReactingParcel<Foam::ThermoParcel<Fo am::KinmaticParcel<Foam::Parcel>>>>>>>>>::typeName is ambiguous'
where basicSprayCloud and sprayCloud are declared in createClouds.H as follows:
Info<<"\nConstructing reacting cloud" << endl;
basicSprayCloud parcels
(
"sprayCloud",
rho,
U,
g,
slgThermo
);
So how to call lookupObject function properly to get the sprayCloud in turbulence model (k function)?

This might help inject particles of different densities - kinematiccloud

"What i did so far is to just add a second cloud in the createClouds.C:"

Info<< "\nConstructing bubble cloud" << endl;
basicSprayCloud bubbles
(
    "bubbles",
    rho,
    U,
    g,
    slgThermo
);

Info<< "\nConstructing catalysator cloud" << endl;
basicSprayCloud cat
(
    "cat",
    rho,
    U,
    g,
    slgThermo
);

Did you try doing this with createClouds.C, because you said you did it in createClouds.H? Maybe that's all?

[NewKid]

Hi, massive_turbulence,
Thanks a lots!
The createClouds.H is one original file of the source files of solver "sprayFoam", what I'm trying to do is to get the "sprayCloud" in the turbulence model file with lookupObject function instead of to declare it in createClouds.H.
Thanks for your kindest helps!

[massive_turbulence]

Originally Posted by NewKid

Hi, massive_turbulence,
Thanks a lots!
The createClouds.H is one original file of the source files of solver "sprayFoam", what I'm trying to do is to get the "sprayCloud" in the turbulence model file with lookupObject function instead of to declare it in createClouds.H.
Thanks for your kindest helps!

You mean inside the /constant/turbulenceProperties file?

I think you could compile a .so file and call it from "/constant/turbulenceProperties" instead as a type but I'm guessing and it's far fetched in terms of the coding. You would still need to declare it in the createClouds.H and then you create a new library file to your liking and place it in the lib folder, something like "OpenFOAM-v1806/platforms/linux64GccDPInt32Opt/lib/"

Either that or this might help objectRegistry::lookupObject<scalar>

[zhangyan]

Did you try this:

const basicSprayCloud & cloud = dynamic_cast<const basicSprayCloud&>(this->mesh_.objectRegistry::lookupObject<sprayCloud>("sprayCloud"));

[NewKid]

Hi, ZhangYan, your code works! Thanks very much!
And what's the parcelType of every parcel in this cloud if I have to access every parcel's parameters, such like velocity, mu, density or something like that.
const parcelType& droplet=cloud[index];

[NewKid]

After getting "cloud" as mentioned above, to traverse the parcels in the cloud, a forAll macro is called as follows:
forAll(cloud,parcelI)
{
const basicSprayParcel& droplet=dynamic_cast<const basicSprayParcel&>(cloud[parcelI]);
}//Compiling error: cloud has no operator []
where parcelI is the "index" in const parcelType& droplet=cloud[index];
Or another macro
forAllConstIter(typename SprayCloud<CloudType>,*cloud,iter)
{
...
}
The latter shows compiling errors too.

[massive_turbulence]

Originally Posted by NewKid

After getting "cloud" as mentioned above, to traverse the parcels in the cloud, a forAll macro is called as follows:
forAll(cloud,parcelI)
{
const basicSprayParcel& droplet=dynamic_cast<const basicSprayParcel&>(cloud[parcelI]);
}//Compiling error: cloud has no operator []
where parcelI is the "index" in const parcelType& droplet=cloud[index];
Or another macro
forAllConstIter(typename SprayCloud<CloudType>,*cloud,iter)
{
...
}
The latter shows compiling errors too.

The bracket operator is probably not overloaded for that type but there might be a function call that returns what you need, otherwise you'll need to write your own overloaded [] and return whatever cloud has at that index.

[olesen]

You cannot use a [] operator since a cloud is not a random access array. You can use an iterator access with begin/end. If you are using OpenFOAM-v1712 or newer, the iterators are properly defined and you can use a for-range as well.

[massive_turbulence]

Originally Posted by olesen

You cannot use a [] operator since a cloud is not a random access array. You can use an iterator access with begin/end. If you are using OpenFOAM-v1712 or newer, the iterators are properly defined and you can use a for-range as well.

It must be a list then, like a STL list with an iterator?

[NewKid]

Olsen and massive_turbulence, thank both of you!
I tried forAllConstIter macro, anyway, the proper type of iterator, or the parameters of forAllConstIter(typename SprayCloud<CloudType>,*cloud,iter) confuse me since "cloud" is retrieved via "const basicSprayCloud & cloud = dynamic_cast<const basicSprayCloud&>(this->mesh_.objectRegistry::lookupObject<sprayCloud>("s prayCloud"));"
Any clues？
I use OF 4.0.

[massive_turbulence]

Originally Posted by NewKid

Olsen and massive_turbulence, thank both of you!
I tried forAllConstIter macro, anyway, the proper type of iterator, or the parameters of forAllConstIter(typename SprayCloud<CloudType>,*cloud,iter) confuse me since "cloud" is retrieved via "const basicSprayCloud & cloud = dynamic_cast<const basicSprayCloud&>(this->mesh_.objectRegistry::lookupObject<sprayCloud>("s prayCloud"));"
Any clues？

This typename SprayCloud<CloudType> is somehow equivalent to this dynamic_cast<const basicSprayCloud&>(this->mesh_.objectRegistry::lookupObject<sprayCloud>("s prayCloud"))

Dynamic casting works by going up a "tree" of sorts in the object hierarchy and somehow that gets created at runtime. I'm not too clear on the process either.

[NewKid]

I agree with Olesen, it is impossible to traverse the parcels with operator [], iterator is a good choice!
Therefore, the question is how to traverse the parcels of the "cloud" via iterator, i.e. the parameters of forAllConstIter() macro.
And what is the difference between forAllConstIter() and forAllIter()?

[NewKid]

Thanks all the contributors to this thread!
It seems this problem is solved, details come as follows:
1. Get the cloud
const basicSprayCloud & cloud = dynamic_cast<const basicSprayCloud&>(this->mesh_.objectRegistry::lookupObject<sprayCloud>("s prayCloud"));
2. Traverse all the parcels
forAllConstIter(typename basicSprayCloud, cloud, iter)
3. Access every parcel in the cloud
const basciSprayParcel & d =iter();
d has many attributes, enjoy it!
After all the steps above, write your code in turbulence model source file!
Once there is something wrong or not complete/proper, please let me know or email me: swust_lt@sina.com