Universal gridless numerical result post-processing method
A meshless, numerical technology, applied in the field of computational mechanics, which can solve problems such as low accuracy, poor versatility, and only zero-order accuracy
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Embodiment 1
[0073] Embodiment 1 The process of the technical solution of the present invention will be described below by taking the two-dimensional intracavity shear flow as an example, as figure 1 shown.
[0074] step 1
[0075] Taking the shear flow in a two-dimensional cavity as an example, the side length of the square cavity is L=0.001m, the particle distance at the initial moment is dx=dy=0.00025m, the smooth length h=λdx, where λ=1.3, and the particle density is Density ρ of air p =1.27kg / m 3 , the mass of the particle m p =ρdxdy, the velocity u of the particles on the upper wall p =0.001m / s remains unchanged, the velocity of the left and right walls and the lower wall is 0. The shear flow in the cavity is numerically simulated by any mesh-free method (such as SPH, ISPH, FPM, FVPM). Here, the SPH method is used to obtain all the physical quantities of the particles in the cavity and its boundary, including the density ρ p , mass m p , speed u in x direction p , y-directio...
Embodiment 2
[0091] Embodiment 2 The technical solution of the present invention will be described below by taking natural convection as an example.
[0092] step 1
[0093] Taking natural convection as an example, the side length of the square cavity is L=0.1m, the distance between particles at the initial moment is dx=dy=0.002m, the smooth length h=λdx, where λ=1.3, and the particle density is the density ρ of air under standard conditions p =1.27kg / m 3 , the mass of the particle m p =ρdxdy, the velocity of all wall particles is 0, the upper and lower walls adopt adiabatic boundary conditions, the temperature of the left and right walls is constant, the left wall is a high temperature wall, the right wall is a low temperature wall, and the temperature difference between the left and right walls ΔT=10k. Numerical simulation of natural convection is carried out by any meshless method (such as SPH, ISPH, FPM, FVPM). Here, the SPH method is used to obtain all the physical quantities of the...
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