Thanks to X-RaY for providing some crucial info on correct settings! I was going the wrong way with one of my variables...
Here is a time domain analysis of the same spherical end-plate frustum I was working with yesterday (TE013).
Thanks to X-RaY for providing some crucial info on correct settings! I was going the wrong way with one of my variables...
Here is a time domain analysis of the same spherical end-plate frustum I was working with yesterday (TE013).
This makes sense ! 
I'd agree with you Dr. Rodal. I have a hard time keeping the still frame pictures in my mind without seeing them animate.
Thanks to X-RaY for providing some crucial info on correct settings! I was going the wrong way with one of my variables...
Here is a time domain analysis of the same spherical end-plate frustum I was working with yesterday (TE013).
Upon further examination...
That picture is showing the surface currents (according to the label on the upper right hand corner).
Not clear what is being shown.
I'm not sure how to interpret this "surface currents" plot on the blue plane (apparently a
flat plane ? ) that intersects the interior of the cavity (is the plane going through the interior of the cavity ?), which is supposed to be empty inside. Surface currents are only supposed to take place on the curved internal surfaces of the metal, at depths comparable to the skin depth. No surface currents in the air (or vacuum) inside the cavity, since there are no free electrons or ions being modeled in the medium inside the cavity (air or vacuum), is that correct ?.
And, on the other hand, if the plane surface intersects the interior curved surface, it should be tangential to the interior surface, so how come it extends to the sides?
Could you please show the electric and the magnetic fields ?
Thank you
Thanks to X-RaY for providing some crucial info on correct settings! I was going the wrong way with one of my variables...
Here is a time domain analysis of the same spherical end-plate frustum I was working with yesterday (TE013).
I remember once asking if the top plate shouldn't be flipped from curving in to out, concave to convex TT said it would not work and cause disruption. I wonder if you wouldn't mind flipping the small end around to prove or disprove?
Shell
Thanks to X-RaY for providing some crucial info on correct settings! I was going the wrong way with one of my variables...
Here is a time domain analysis of the same spherical end-plate frustum I was working with yesterday (TE013).
That picture is showing the surface currents (according to the label on the upper right hand corner).
Not clear what is being shown.
I'm not sure how to interpret this "surface currents" plot on the blue plane (apparently a flat plane ? ) that intersects the interior of the cavity (is the plane going through the interior of the cavity ?), which is supposed to be empty inside. Surface currents are only supposed to take place on the curved internal surfaces on the skin depth. No surface currents in the air (or vacuum) inside the cavity.
And, on the other hand, if the plane surface intersects the interior curved surface, it should be tangential to the interior surface, so how come it extends to the sides?
Could you please show the electric and the magnetic fields ?
Thank you
I think this IS the H or E field at the defined plane. To display the surface currents is only one way to visualise. E,H,Poynting are available, also the underlying vectors and single components.
Combinations are possible.
I think the field (E or H) is shown in the plain and in addition of this the surface currents, the view of the frustum body is almost transparent and the indication in the upper corner is related to the (transparent) surface currents at the walls.
Could you please show the electric and the magnetic fields ?
That label is half correct. The center slice is the electric field. The surface current comes from the frustum walls (which you can kind of see, but I have a cut plane removing most of it - so it's not really relevant). You are seeing the electric field though. I think the label isn't showing up because I had something else selected when I exported the movie. Let me re-export it.
Could you please show the electric and the magnetic fields ?
That label is half correct. The center slice is the electric field. The surface current comes from the frustum walls (which you can kind of see, but I have a cut plane removing most of it - so it's not really relevant). You are seeing the electric field though. I think the label isn't showing up because I had something else selected when I exported the movie.
If this is a TE mode:
I think that
this is the magnetic field inside the cavity.
Because the electric is tangential (transverse direction) and therefore it should be zero at the surfaces.
the tangential component of E is continuous across the interface:
Hence I suspect that this is the magnetic H field inside the cavity and it is the Eddy Currents on the surface (caused by the magnetic field)
The magnetic field in the axial direction (really in the spherical radii direction "r" shown below, to be precise) is not zero at the boundaries.
the magnetic field satisfies the continuity condition with the Eddy Current at the interior surface of the cavity js
Thanks to X-RaY for providing some crucial info on correct settings! I was going the wrong way with one of my variables...
Here is a time domain analysis of the same spherical end-plate frustum I was working with yesterday (TE013).
Upon further examination...
That picture is showing the surface currents (according to the label on the upper right hand corner).
Not clear what is being shown.
I'm not sure how to interpret this "surface currents" plot on the blue plane (apparently a flat plane ? ) that intersects the interior of the cavity (is the plane going through the interior of the cavity ?), which is supposed to be empty inside. Surface currents are only supposed to take place on the curved internal surfaces of the metal, at depths comparable to the skin depth. No surface currents in the air (or vacuum) inside the cavity, since there are no free electrons or ions being modeled in the medium inside the cavity (air or vacuum), is that correct ?.
And, on the other hand, if the plane surface intersects the interior curved surface, it should be tangential to the interior surface, so how come it extends to the sides?
Could you please show the electric and the magnetic fields ?
Thank you
I think were are seeing the large computational cell sizes and the cells extend to the outside of the walls Dr. Rodal.
Shell
Just doing some morning reading. Thought I'd like to share.
http://boingboing.net/2014/11/24/the-quest-for-a-reactionless-s.html
The first test conducted by NASA on Shawyer's EM Drive measured <<NO significant>> anomalous force, even at power inputs 12 times higher than the power input at which an anomalous force was later reported with a dielectric insert.
* 30 Watts for TE012 mode shape with NO dielectric: no significant measurable force
* 2.6 Watts for TE012 mode shape with dielectric: the highest force/InputPower measured in the NASA report !!!!!
This bears repeating: same mode shape, no dielectric results in no significant measureable force even when employing over 12 times higher input power !!!!!!
When NASA tested the Cannae device, they found the same as they did with the frustum of a cone: no significant force without a dielectric insert in the Cannae device as well. NASA only reported significant anomalous force when a dielectric insert was inserted in the Cannae drive.
Fortunately, Paul March was in the NASA Eagleworks team, since Paul had worked with Prof. Woodward, who, based on the Mach Effect and relativity, showed that if a dielectric is submitted to a varying electric power (charge or discharge), Woodward's hypothesis predicts a transient mass fluctuation, see this:
https://en.wikipedia.org/wiki/Woodward_effect#Transient_mass_fluctuation
Maybe I am wrong but this looks like the modification of the relativistic mass of light that I am looking for to red-shift light inside the cavity, converting the lights energy in the cavity into the momentum/energy of the cavity. It is a pretty simple analogy using the ratio of exchange in energy of the photon impacting a wall in the cavity, where at one wall the lights relativistic mass changes as opposed to the other wall. It should be similar to how 2 free floating mirrors, having light bouncing between them, accelerate and red shift the light between them, not letting the photons escape and draining them of their energy, unlike a solar sail which lets light escape
https://en.wikipedia.org/wiki/Photonic_laser_thruster. However, using the dielectric it is all contained inside the cavity.
The image below is of the ratio of energy exchanged between two colliding objects with the mass of one object as a free variable. Now consider this exchange of energy as the object bounces between plates and has its mass modified. Now parallel this to a photon and it seems to be the Woodward effect made simple.
I think were are seeing the large computational cell sizes and the cells extend to the outside of the walls Dr. Rodal.
Shell
That is correct Shell! It is a form of aliasing. I'm exporting both the E and H field separately and properly labeled now. Should have them up in 15 minutes or so.
I think were are seeing the large computational cell sizes and the cells extend to the outside of the walls Dr. Rodal.
Shell
That is correct Shell! It is a form of aliasing. I'm exporting both the E and H field separately and properly labeled now. Should have them up in 15 minutes or so.
NO
There is no aliasing in Finite Element, Finite Difference or in Boundary Element (Method of Moments) solutions.
Aliasing occurs in spectral methods.
The boundary conditions are satisfied locally (for example
at the nodes of FE or FD). Boundary element method (method of moments) attempts to use the given boundary conditions to fit boundary values into the integral equation. None of them will display aliasing.
What is being shown is the magnetic field as I explained above.
http://forum.nasaspaceflight.com/index.php?topic=39004.msg1496468#msg1496468
That's why it reads surface currents.
The H magnetic field in the axial direction for TE modes, is continuous at the surfaces. The H field is not zero next to the lateral surfaces. This is what is being shown: the magnitude of the magnetic field:
Sqrt[Hx2+Hy2+Hz2]
It simply cannot be the Electric Field, as I explained, since the electric field boundary conditions are incompatible with what is being shown.
The electric field, shown by X Ray here:
is zero next to the surfaces, as it should be.
Shell, look at the coarseness in X-Ray's mesh solution image: even though the mesh is coarse, the electric field still decays to zero near the irregular surface mesh, since the boundary conditions are satisfied on the irregular mesh surface
Properly labeled electric and magnetic time domain analysis, separated into two videos.
compare with the previous video showing the surface currents:
That surface current video is showing a near field slice down the middle. That rectangular slice is the E field.
Here is the correct surface current animation:
THE OMG moment still fills my thoughts as what I heard was like a 2kg mass dropping several cms inside the small end down frustum (very solid THUD).
That sounds like an extraordinary result. I sincerely hope you can replicate it (and capture it on video - seriously guys, why aren't we recording every experiment on film, just in case? Recording and storage is practically free)!
compare with the previous video showing the surface currents:
That surface current video is showing a near field slice down the middle. That rectangular slice is the E field.
Here is the correct surface current animation:
...
Can you please show the magnetic field in the
axial direction ?
Thanks
I think were are seeing the large computational cell sizes and the cells extend to the outside of the walls Dr. Rodal.
Shell
That is correct Shell! It is a form of aliasing. I'm exporting both the E and H field separately and properly labeled now. Should have them up in 15 minutes or so.
NO
There is no aliasing in Finite Element, Finite Difference or in Boundary Element (Method of Moments) solutions.
Aliasing occurs in spectral methods.
The boundary conditions are satisfied locally (for example at the nodes of FE or FD). Boundary element method (method of moments) attempts to use the given boundary conditions to fit boundary values into the integral equation. None of them will display aliasing.
What is being shown is the magnetic field as I explained above.
http://forum.nasaspaceflight.com/index.php?topic=39004.msg1496468#msg1496468
That's why it reads surface currents.
The H magnetic field in the axial direction for TE modes, is continuous at the surfaces. The H field is not zero next to the lateral surfaces. This is what is being shown: the magnitude of the magnetic field:
Sqrt[Hx2+Hy2+Hz2]
It simply cannot be the Electric Field, as I explained, since the electric field boundary conditions are incompatible with what is being shown.
The electric field, shown by X Ray here:
is zero next to the surfaces, as it should be.
Shell, look at the coarseness in X-Ray's mesh solution image: even though the mesh is coarse, the electric field still decays to zero near the irregular surface mesh, since the boundary conditions are satisfied on the irregular mesh surface
Silly me, I thought you were talking about the computational mesh's cell extending outside of the cavity showing color. Of course it's correct.
Don't try to confuse me more I'm already there.
Finally 
was able to get to my 3 foot x 5 foot 1/2" thick plate in my storage buried by 8 years of stuff (also lots of ice and snow). I can pull down the thin 1/4" plate I have been using and replace it with a 3x5 .5" 1x1" 1/4-20 hole patterned plate to use to securely mount the hardware on. YEA!!!
You know that darn thing is very heavy for one person!
BUT.....
Can you please show the magnetic field in the axial direction ?
Unfortunately, I didn't request a near field in that direction for this run. It would be nice to have now that you point it out. I will probably run it again with several near field requests. Best to run over night while i'm sleeping as it really bogs my computer down.
was able to get to my 3 foot x 5 foot 1/2" thick plate in my storage buried by 8 years of stuff (also lots of ice and snow). I can pull down the thin 1/4" plate I have been using and replace it with a 3x5 .5" 1x1" 1/4-20 hole patterned plate to use to securely mount the hardware on. YEA!!!