The results show that pores of the coal can be divided into three types according to the pore diameter boundaries of 6,000 nm and 100 nm.The multi-scale fractal dimensions of coal pores (D1, D2, D3) are in the range of 2.341 2.836, 2.041 to 2.476, 2.237 to 2.656, respectively.
It is shown that in the axisymmetric case (circular tube with varying diameter) for boundary conditions of the first kind the diameter variation has no influence at all on the heat transferred.
The effects of the small scale on natural frequencies are investigated considering various parameters such as the radius of the plate, radius ratio, nodal circle, nodal diameter number, boundary conditions and mode numbers.
The principal damage zone was sharply-defined in an area 14 miles (23 km) in diameter; the boundaries of the damage resembled the path of a tornado, although a subsequent analysis indicated the majority of the damage was not tornadic in nature.
The effect of plate thickness, volume fraction indices, diameter ratio and boundary conditions on natural frequencies are also reported.
The method is used to explore the maximum nozzle diameter for specific boundary conditions for which there is no ignition.
We write (h_{E}) for the diameter of a boundary (Einmathcal{E}_{h}).
Parametric studies conclude that free vibration frequencies are dependent not only on the radius to thickness ratio, but also on plate parameters such as the fiber orientation, lamination sequence, hole diameter and the boundary conditions.
By using the differential quadrature (DQ) method, the governing Timoshenko equations are solved for CNTs of different length-to-diameter ratios and boundary conditions.
The region of reactor temperature vs feed concentration in which hot spots exist increases with ring diameter, and its boundaries are sensitive to the intensity of mixing in the vessel.
