SMV view of gravity vector

[fde]

The example file of the code given in User guide 7.4 Gravity gives an outlook in SMV as below. I do not understand why g vector is so off from z. Could you please explain?

Thank you

[fde]

&HEAD CHID='V1'/

&TIME T_END=0.0/

&MESH ID='Mesh01', IJK=100,10,10 XB=0,100,0,10,0,10/

&MISC GVEC=1.,0.,1., RAMP_GX='x-ramp', RAMP_GZ='z-ramp' /

&RAMP ID='x-ramp', X= 0., F=0.0 /

&RAMP ID='x-ramp', X= 50., F=0.0 /

&RAMP ID='x-ramp', X= 51., F=-0.49 /

&RAMP ID='x-ramp', X=100., F=-0.49 /

&RAMP ID='z-ramp', X= 0., F=-9.81 /

&RAMP ID='z-ramp', X= 50., F=-9.81 /

&RAMP ID='z-ramp', X= 51., F=-9.80 /

&RAMP ID='z-ramp', X=100., F=-9.80 /

&TAIL /

[Glenn Forney]

Z vector normally points up. G vector normally points in negative z direction ie down. In an fds input file you can define G to point in an arbitrary direction allowing you to simulate a hall that slopes. I don't have access to the example you are referring to but imagine it is an example of simulating a sloped compartment

On Fri, Apr 5, 2019, 11:10 AM fde <yilmaz....@gmail.com> wrote:

The example file of the code given in User guide 7.4 Gravity gives an outlook in SMV as below. I do not understand why g vector is so off from z. Could you please explain?

Thank you

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[fde]

I understand that slope is shown in SMV and g is always down but in the example above (second post) slope is a rather small angle. However in SMV it is represented in a much larger angle. That confused me.

On Saturday, April 6, 2019 at 3:36:59 AM UTC+2, Glenn Forney wrote:

Z vector normally points up. G vector normally points in negative z direction ie down. In an fds input file you can define G to point in an arbitrary direction allowing you to simulate a hall that slopes. I don't have access to the example you are referring to but imagine it is an example of simulating a sloped compartment

On Fri, Apr 5, 2019, 11:10 AM fde <yilmaz...@gmail.com> wrote:

The example file of the code given in User guide 7.4 Gravity gives an outlook in SMV as below. I do not understand why g vector is so off from z. Could you please explain?

Thank you

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To unsubscribe from this group and stop receiving emails from it, send an email to fds...@googlegroups.com.

[dr_jfloyd]

We only write GVEC to the SMV file and the Smokeview doesn't know about the RAMP. On your MISC line GVEC=1,01 which matches the image you attached. If you want Smokeview to draw your geometry at something that resembles your average GVEC you could try:

&MISC GVEC=-0.245,-9.805/

Then for the x-ramp you would have F=2 and for the z-ramp you would have F=0.99949

[fde]

That solves my issue. Thank you.