We consider a granular gas under the action of gravity, fluidized by avibrating base. We show that a horizontal temperature gradient, here induced bylimiting dissipative lateral walls (DLW), leads always to a granular thermalconvection (DLW-TC) that is essentially different from ordinary buoyancy-drivenconvection (BD-TC). In an experiment where BD-TC is inhibited, by reducinggravity with an inclined plane, we always observe a DLW-TC cell next to eachlateral wall. Such a cell squeezes towards the nearest wall as the gravityand/or the number of grains increase. Molecular dynamics simulations reproducethe experimental results and indicate that at large gravity or number of grainsthe DLW-TC is barely detectable.
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