Since We Use Non-linear Artificial Diffusion

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We perform an unprecedented excessive-decision simulation for the solar convection zone. Our calculation reproduces the fast equator and close to-surface shear layer (NSSL) of differential rotation and the close to-floor poleward meridional movement concurrently. The NSSL is located in a posh layer where the spatial and time scales of thermal convection are significantly small in contrast with the deep convection zone. While there have been a number of makes an attempt to reproduce the NSSL in numerical simulation, the results are still removed from reality. In this study, we achieve reproducing an NSSL in our new calculation. 4) the turbulent viscosity and magnetic tension are latitudinally balanced with the Coriolis power shears in the NSSL. We emphasize the importance of the magnetic subject in the photo voltaic convection zone. ††software: R2D2 Hotta et al. The Sun is rotating differentially with the fast equator and the slow pole. Omega within the solar inside. In the photo voltaic convection zone, outdoor branch trimmer we've two shear layers, i.e., the tachocline around the bottom of the convection zone and the close to-floor shear layer (NSSL).



The tachocline is thought to be maintained by the interaction between the convection and radiation zones (Spiegel & Zahn, 1992; Gough & McIntyre, heavy duty pruning shears 1998; Forgács-Dajka & Petrovay, 2001; Rempel, 2005; Brun et al., 2011; Matilsky et al., 2022). The NSSL is thought to be maintained by the small-spatial and brief time scales of the convection in the layer. T/g, the place TT and outdoor branch trimmer gg are the temperature and the gravitational acceleration, respectively. 60 and 2 Mm, respectively. Thus, the time scales of the convection vary from a month to several hours in these areas. As a result, the convection within the NSSL isn't considerably affected by the rotation. ′ denote the longitudinal average and the deviation from the common. In addition, Miesch & Hindman (2011) recommend that we need a force to balance with the latitudinal Coriolis force to keep up the NSSL. It is troublesome for numerical simulations to cover a broad vary of spatial and time scales. The numerical strategy for the NSSL is extremely restricted.



Guerrero et al. (2013) improve the superadiabaticity around the top boundary of their calculation field and focus on the formation mechanism of the NSSL following Foukal & Jokipii (1975). Hotta et al. NSSL-like characteristic, particularly at low and high latitudes. We argue there that the NSSL is maintained by the radially inward angular momentum transport and the turbulent viscosity on the sheared meridional circulation. Hotta et al. (2015) fail to reproduce the NSSL in mid-latitude. Matilsky et al. (2019) perform an identical calculation to Hotta et al. 2015) and reproduce the NSSL-like function at high and low latitudes. The authors also fail to reproduce the NSSL in the mid-latitude. They conclude that the detailed building mechanism of the meridional move have to be understood to reproduce the correct NSSL. Of their examine, Wood Ranger Power Shears highly rotationally constrained convection referred to as the Busse column, outdoor branch trimmer is required to reproduce the solar-like fast equator differential rotation. Hotta et al. (2015) reduced the photo voltaic luminosity and outdoor branch trimmer Matilsky et al.



2019) increased the rotation price in order to reinforce the rotational influence on the thermal convection. We observe that the lower in luminosity and the rise in rotation price have the same impact on the Rossby number. Matilsky et al. (2019) argue that when the rotationally constrained Busse column exists within the deep layer, upflows are rotationally constrained even within the close to-floor excessive Rossby number layer. The environment friendly generation of the close to-floor circulation by way of the gyroscopic pumping effectively suppresses the development of the NSSL. When the previous calculation (Hotta et al., 2015; Matilsky et al., 2019) was carried out, we did not have any manner to keep up the photo voltaic-like DR without using the lowered luminosity, bigger rotation rates or enhanced diffusivities (photo voltaic convective conundrum). That's, the everyday "high-resolution" simulations fall into anti-photo voltaic differential rotation. O’Mara et al., 2016; Hotta et al., 2023). Hotta & Kusano (2021)(hereafter HK21) and Hotta et al. 2022)(hereafter HKS22) lately provide a attainable answer to assemble the photo voltaic-like differential rotation with out using particular therapy shown above.