New subject: yt-users Digest, Vol 151, Issue 6

23 Sep 2020

      Hi Matthew,

Thanks for your reply. Then if there is no translation for the spatial 
coordinates what is happening to the velocities of the cells belonging 
to the disk?
I'm asking that because what I see on my code is that the velocities and 
the disk that is on the negative X region show a distribution that 
corresponds to the middle of the computational domain and the same 
happens to the distribution of the velocities on the disk that is on the 
positive X region. However, since the coordinate system of both the 
cylinder and the computational domain are at rest there shouldn't be a 
any difference. So, I wonder what are the velocities that I get when I 
do something like this:

disk['velocity_x']

The fact that the velocities that I'm getting correspond to another 
region makes me believe that there is something wrong on the disk 
structure code and it is always taking cells locate on the center that 
correspond to a center c=[0.5,0.5,0.5]. Is there any way to verify where 
the cylinder is located in the computational domain?

Regards,

El sáb., 19 sept. 2020 a las 11:02, <yt-users-request@python.org 
<mailto:yt-users-request@python.org>> escribió:

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    Today's Topics:

        1. yt.disk (Guido granda muñoz)
        2. Re: yt.disk (Matthew Turk)

    ----------------------------------------------------------------------

    Message: 1
    Date: Fri, 18 Sep 2020 16:05:21 -0500
    From: Guido granda muñoz <guidogranda@gmail.com
    <mailto:guidogranda@gmail.com>>
    Subject: [yt-users] yt.disk
    To: yt-users@python.org <mailto:yt-users@python.org>
    Message-ID:

    <CALOHZ_0=sr94xUKaxvBuRki99xZtKQtezhx3nEXXqDV9Ly4S1g@mail.gmail.com
    <mailto:sr94xUKaxvBuRki99xZtKQtezhx3nEXXqDV9Ly4S1g@mail.gmail.com>>
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    Hello yt-users,

    I have a question about the disk data object. The first input it
    needs is
    center, which according to your website is the coordinates of the
    geometrical center of the disk on the simulation length units. So, the
    center of the computational domain is c=3D[0.5,0.5,0.5].

    I set the center of two different cylinders in a way that they
    don=E2=80=99=
    t
    overlap. The axis of these cylinders are parallel to the x axis and
    one is
    on the negative X coordinate region while the other one on the positive
    region. But, I found that they actually have exactly the same cell
    centers.
    Did I do something wrong?

    On the following code the box side is 256 pc, so the center of the first
    disk c_1=3D[0.25,0.5,0.5] with a height of 32 pc does not overlap
    with the
    second disk of center c_2=3D[0.75,0.5,0.5] also with height 32 pc.

    http://paste.yt-project.org/show/275/

    I=E2=80=99m using :

    ---

    Version =3D 3.6.dev0

    And the snapshot used is here:

    http://use.yt/upload/c58a4c0f

    --=20
    Guido

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    <div dir=3D"ltr"><br clear=3D"all"><div>
    =09
    =09

    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%">Hello
    yt-users,</p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%">I have
    a question about the disk data object. The first input it needs is
    center, which according to your website is the coordinates of the
    geometrical center of the disk on the simulation length units. So,
    the center of the computational domain is c=3D[0.5,0.5,0.5].<br></p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%">I set
    the center of two different cylinders in a way that they don=E2=80=99t
    overlap. The axis of these cylinders are parallel to the x axis and
    one is on the negative X coordinate region while the other one on the
    positive region. But, I found that they actually have exactly the
    same cell centers. Did I do something wrong?<br></p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%">On the
    following code the box side is 256 pc, so the center of the first
    disk c_1=3D[0.25,0.5,0.5] with a height of 32 pc does not overlap with
    the second disk of center c_2=3D[0.75,0.5,0.5] also with height 32
    pc.=20
    </p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%"><a
    href=3D"h=
    ttp://paste.yt-project.org/show/275/
    <http://paste.yt-project.org/show/275/>">http://paste.yt-project.org/show/275/=
    </a><br></p>
    <p lang=3D"en-US"
    style=3D"margin-bottom:0in;line-height:100%">I=E2=80=99m
    using :<br></p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%">---</p>
    <p lang=3D"en-US"
    style=3D"margin-bottom:0in;border-top:none;border-bottom:=
    1px solid rgb(0,0,0);border-left:none;border-right:none;padding:0in
    0in 0.0=
    3in;line-height:100%">
    Version =3D 3.6.dev0</p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%">And the
    snapshot used is here:<br></p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%"><a
    href=3D"h=
    ttp://use.yt/upload/c58a4c0f
    <http://use.yt/upload/c58a4c0f>">http://use.yt/upload/c58a4c0f</a></p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%"><br>

    </p></div>-- <br><div dir=3D"ltr" class=3D"gmail_signature"
    data-smartmail=
    =3D"gmail_signature">Guido</div></div>

    --000000000000855e3c05af9cdca7--

    ------------------------------

    Message: 2
    Date: Fri, 18 Sep 2020 17:13:40 -0500
    From: Matthew Turk <matthewturk@gmail.com
    <mailto:matthewturk@gmail.com>>
    Subject: [yt-users] Re: yt.disk
    To: Discussion of the yt analysis package <yt-users@python.org
    <mailto:yt-users@python.org>>
    Message-ID:

    <CALO3=5GozUpChB+gLs-F1toed22XjDM6F4zEG4j4k=9Nu1HAJw@mail.gmail.com
    <mailto:9Nu1HAJw@mail.gmail.com>>
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    Hi Guido,

    The cell centers will indeed be the same -- there's no coordinate
    translation that is done when you access just the 'x' 'y' and 'z'
    fields.
    I believe that the fields you might be looking for are
    "cylindrical_radius"
    "cylindrical_z" and "cylindrical_theta".

    On Fri, Sep 18, 2020 at 4:06 PM Guido granda mu=C3=B1oz
    <guidogranda@gmail.=
    com>
    wrote:

     >
     > Hello yt-users,
     >
     > I have a question about the disk data object. The first input it
    needs is
     > center, which according to your website is the coordinates of the
     > geometrical center of the disk on the simulation length units.
    So, the
     > center of the computational domain is c=3D[0.5,0.5,0.5].
     >
     > I set the center of two different cylinders in a way that they
    don=E2=80=
    =99t
     > overlap. The axis of these cylinders are parallel to the x axis
    and one i=
    s
     > on the negative X coordinate region while the other one on the
    positive
     > region. But, I found that they actually have exactly the same
    cell center=
    s.
     > Did I do something wrong?
     >
     > On the following code the box side is 256 pc, so the center of
    the first
     > disk c_1=3D[0.25,0.5,0.5] with a height of 32 pc does not overlap
    with th=
    e
     > second disk of center c_2=3D[0.75,0.5,0.5] also with height 32 pc.
     >
     > http://paste.yt-project.org/show/275/
     >
     > I=E2=80=99m using :
     >
     > ---
     >
     > Version =3D 3.6.dev0
     >
     > And the snapshot used is here:
     >
     > http://use.yt/upload/c58a4c0f
     >
     >
     > --
     > Guido
     > _______________________________________________
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     > To unsubscribe send an email to yt-users-leave@python.org
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     > Member address: matthewturk@gmail.com <mailto:matthewturk@gmail.com>
     >

    --000000000000d95c4e05af9dd04e
    Content-Type: text/html; charset="UTF-8"
    Content-Transfer-Encoding: quoted-printable

    <div dir=3D"ltr">Hi Guido,<div><br></div><div>The cell centers will
    indeed =
    be the same -- there's no coordinate translation that is done
    when you =
    access just the 'x' 'y' and 'z'
    fields.=C2=A0 I bel=
    ieve that the fields you might be looking for are
    "cylindrical_radius&=
    quot; "cylindrical_z" and
    "cylindrical_theta".</div></d=
    iv><br><div class=3D"gmail_quote"><div dir=3D"ltr"
    class=3D"gmail_attr">On =
    Fri, Sep 18, 2020 at 4:06 PM Guido granda mu=C3=B1oz <<a
    href=3D"mailto:=
    guidogranda@gmail.com
    <mailto:guidogranda@gmail.com>">guidogranda@gmail.com
    <mailto:guidogranda@gmail.com></a>> wrote:<br></div><block=
    quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px
    0.8ex;border-left:1=
    px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><br
    clear=3D"a=
    ll"><div>
    =09
    =09

    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%">Hello
    yt-users,</p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%">I have
    a question about the disk data object. The first input it needs is
    center, which according to your website is the coordinates of the
    geometrical center of the disk on the simulation length units. So,
    the center of the computational domain is c=3D[0.5,0.5,0.5].<br></p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%">I set
    the center of two different cylinders in a way that they don=E2=80=99t
    overlap. The axis of these cylinders are parallel to the x axis and
    one is on the negative X coordinate region while the other one on the
    positive region. But, I found that they actually have exactly the
    same cell centers. Did I do something wrong?<br></p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%">On the
    following code the box side is 256 pc, so the center of the first
    disk c_1=3D[0.25,0.5,0.5] with a height of 32 pc does not overlap with
    the second disk of center c_2=3D[0.75,0.5,0.5] also with height 32
    pc.=20
    </p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%"><a
    href=3D"h=
    ttp://paste.yt-project.org/show/275/
    <http://paste.yt-project.org/show/275/>"
    target=3D"_blank">http://paste.yt-pro=
    ject.org/show/275/ <http://ject.org/show/275/></a><br></p>
    <p lang=3D"en-US"
    style=3D"margin-bottom:0in;line-height:100%">I=E2=80=99m
    using :<br></p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%">---</p>
    <p lang=3D"en-US"
    style=3D"margin-bottom:0in;border-top:none;border-bottom:=
    1px solid rgb(0,0,0);border-left:none;border-right:none;padding:0in
    0in 0.0=
    3in;line-height:100%">
    Version =3D 3.6.dev0</p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%">And the
    snapshot used is here:<br></p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%"><a
    href=3D"h=
    ttp://use.yt/upload/c58a4c0f <http://use.yt/upload/c58a4c0f>"
    target=3D"_blank">http://use.yt/upload/c58a4c=
    0f <http://use.yt/upload/c58a4c=0f></a></p>
    <p lang=3D"en-US" style=3D"margin-bottom:0in;line-height:100%"><br>

    </p></div>-- <br><div dir=3D"ltr">Guido</div></div>
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    </blockquote></div>

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    End of yt-users Digest, Vol 151, Issue 6
    ****************************************

-- 
Guido

Re: yt-users Digest, Vol 151, Issue 6

guido

Matthew Turk

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