162 citations · 283 across the 11 of their papers we have counts for
11 papers
Simultaneous free-surface profilometry and subsurface velocimetry with fringe projection and PIV
Ali Semati, Adharsh Shankaran, Benjamin K. Smeltzer +3
This work presents a novel combination of two well-established techniques: fringe projection profilometry (FPP) and particle image velocimetry (PIV). Despite seemingly conflicting…
Turbulence-induced anti-Stokes flow: experiments and theory
Simen Å. Ellingsen, Olav Rømcke, Benjamin K. Smeltzer +4
We report experimental evidence of an Eulerian-mean flow, , created by the interaction of surface waves and tailored ambient sub-surface turbulence, which partly c…
The Effect of Horizontal Shear on Extracting Water Currents From Surface Wave Data
Stefan Weichert, Benjamin K. Smeltzer, Simen Å. Ellingsen
The dispersive motion of surface waves is now routinely used to remotely measure the currents close beneath the surface of oceans and other natural flows. The current manifests as…
Biases from spectral leakage in remote sensing of near-surface currents
Stefan Weichert, Benjamin K. Smeltzer, Simen Å. Ellingsen
Remotely measuring subsurface water currents from imagery of the wave field has become a much-used technique. We study the biases and errors in such measurements due to spectral le…
On the measurement of the dispersion relation by a radar and the implication on the current retrieval
Susanne Støle-Hentschel, Benjamin Keeler Smeltzer, Yaron Toledo
The work analyses the error in current retrievals from images of marine radars. The study is based on simulations of waves interacting with a shear current. The measured dispersion…
Current Mapping from the Wave Spectrum
Benjamin K. Smeltzer, Simen Å. Ellingsen
In this chapter we review methods by which near--surface ocean currents can be measured remotely using images of the water surface, as obtained by X-band radar in particular. The p…
Observation of surface wave patterns modified by sub-surface shear currents
Benjamin K. Smeltzer, Eirik Æsøy, Simen Å. Ellingsen
We report experimental observations of two canonical surface wave patterns --- ship waves and ring waves --- skewed by sub-surface shear, thus confirming effects predicted by recen…
An improved method for determining near-surface currents from wave dispersion measurements
Benjamin K. Smeltzer, Eirik Æsøy, Anna Ådnøy +1
A new inversion method for determining near-surface shear currents from a measured wave spectrum is introduced. The method is straightforward to implement and starts from the exist…
Transient wave resistance upon a real shear current
Yan Li, Benjamin K. Smeltzer, Simen Å. Ellingsen
We study the waves and wave-making forces acting on ships travelling on currents which vary as a function of depth. Our concern is realism; we consider a real current profile from…
Surface waves on arbitrary vertically-sheared currents
Benjamin K. Smeltzer, Simen Å. Ellingsen
We study dispersion properties of linear surface gravity waves propagating in an arbitrary direction atop a current profile of depth-varying magnitude using a piecewise linear appr…
Robust control of individual nuclear spins in diamond
Benjamin Smeltzer, Jean McIntyre, Lilian Childress
Isolated nuclear spins offer a promising building block for quantum information processing systems, but their weak interactions often impede preparation, control, and detection. Hy…