21. For general flow fields , it is necessary to develop numerical techniques to track down yielded / unyielded regions. 22. The optical flow field illustrates how features diverge from a single point, the " focus of expansion ". 23. The latest flow partly covered the 1986 1992 flow field again, while attracting thousands of visitors a day. 24. The flow field is shown in the upper figure on the right ( created by Gary Koopman ). 25. Turbulent flame speed is a function of the aforementioned parameters, but also heavily depends on the flow field . 26. Extensive lava poured out from this vent to form a lava flow field to the north and east. 27. The method is capable of measuring an entire two-dimensional cross section ( geometry ) of the flow field simultaneously. 28. Laboratory experiments and simulation studies were conducted to investigate complex phenomena such as turbulence in the plasma flow field . 29. This information is then used to make the optical flow field for the detected features in those two images. 30. Specifically, it provides a mathematical way to describe the interactions of a scalar variable within the vector flow field .
