The effects of permeability heterogeneities on rectilinear displacements with viscosity contrast and density variations are investigated computationally by means of direct numerical simulations.
The reported shapes of the perceived paths in these studies are mostly curvilinear, but their shape is neither purely rectilinear nor purely circular or helical.
We do require that the interpolator accept arbitrary spatial arrangements of points, not only rectilinear grids; otherwise these advantages vanish.
Previously considered constraints include the rectilinear propagation of light, conservation of momentum, and the regularity of surface texture.
For the nonrectangular sheet, even with four rectilinear edges, five pieces of data are required, and there is no opportunity to reverse the sheet.
A common feature of examples presented so far is that they are all cases of various combinations of both translations (rectilinear or circular) and rotations.
However, the application of primes and paints doesn't require high accuracy in tool positioning, and the paths of tool travel are mainly rectilinear.
A typical case is that of the rectilinear fluid flow in pipes under the uniform transverse magnetic field.
