Ts (101 101 101) within the x, y, and z directions. In the GPU computation speed test (Section three.3), two setups of computational Atmosphere 2021, 12, x FOR PEER Overview six of 15 grid points were created much more dense, 501 501 201, to evaluate the impact from the number of grid points on computation speed.Figure two. Three varieties incoming radiation boundaries (a ) and setups for the simulations. The Figure 2. Three varieties of of incoming radiation boundaries (a ) and setups for the simulations. The red red vertical planes will be the Z-Xcross sections at Y == 0.5, that are plotted in Outcomes section. vertical planes would be the Z-X cross sections at Y 0.five, that are plotted within the the results section.3. Outcomes RT-LBM is evaluated with all the MC models, due to the fact high-density 3-D radiation field information for these kinds of simulation usually are not obtainable for comparison. Even though the MC model typically calls for considerably more computation power, it has been verified to become a versatileAtmosphere 2021, 12,six ofAll the incoming solar beam radiation is from the leading boundary. The very first will be the incoming boundary which involves the complete major plane on the computational domain (Figure 2a), the second will be the center window incoming boundary condition on the leading boundary (Figure 2b), and also the third (Figure 2c) would be the window incoming boundary with oblique incoming SB-612111 Description direct solar radiation. A unit radiative intensity at the top surface is prescribed for direct solar radiation, f 6 = 1, f 13,14,17,18,19,22,24,25 = 0, for perpendicular beam f 13 = 1, f six,14,17,18,19,22,24,25 = 0, for 45 solar zenith angle beam three. Outcomes RT-LBM is evaluated with all the MC models, due to the fact high-density 3-D radiation field data for these sorts of simulation usually are not readily available for comparison. Although the MC model normally requires far more computation power, it has been verified to be a versatile and precise approach for modeling radiative transfer processes [1,26,29]. Within the following validation circumstances, precisely the same computation domain setups, boundary situations, and radiative parameters were employed within the RT-LBM and MC models. In these simulations, we set every single variable as non-dimensional, like the unit length from the simulation domain in the x, y, and z directions. Normalized, non-dimensional benefits present convenience for application on the simulation benefits. The model domain is a unit cube, with 101 101 101 grid points in these simulations except in Section three.3. The best face in the cubic volume is prescribed having a unit of incoming radiation intensity. The rest in the boundary faces are black walls, i.e., there is no incoming radiation and outgoing radiation freely passes out from the lateral and bottom boundaries. 3.1. Direct Solar Beam Radiation Perpendicular for the Entire Leading Boundary Figure three shows the simulation outcomes in the plane (Y = 0.5) with RT-LBM (left panel) along with the MC model (correct panel). In these simulations, the complete major boundary was a prescribed radiation beam having a unit of intensity and also the other boundaries have been black walls. The simulation parameters had been a = 0.9 and b = 12, which is optically quite thick as within a clouded atmosphere or atmospheric boundary layer inside a forest fire scenario [31]. The two simulation techniques produced equivalent radiation fields in most regions except the MCM produced slightly higher radiative intensity near the prime boundary. Near the side boundaries, the radiative intensity values had been smaller sized as a result of much less scattering from the beam radiation close to the black boundaries. This case is als.
