To　prevent　tobacco　buildup　on　the　inner　wall　of　a　horizontal　casing　cylinder,　the　Hertz-Mindlin　adhesion　force　model　was　introduced　and　simplified　mechanical　models　were　established　for　the　tobacco　adhesion　phenomenon　on　the　cylinder　wall　and　the　formation　mechanism　of　the　tobacco　curtain　inside　the　cylinder.　Differential　equations　were　also　derived　for　the　adhesion　conditions　and　sliding/projecting　movement　of　tobacco　particles.　Numerical　simulations　were　conducted　to　analyze　the　impact　of　process　parameters　on　tobacco　adhesion　conditions　and　the　trajectories　of　tobacco　sliding　and　projecting　movement.　Additionally,　the　atomization　effects　of　casing　spraying　were　simulated　using　the　computational　fluid　dynamics（CFD）method.　The　results　showed　that:　1）The　adhesion　of　tobacco　particles　to　the　inner　wall　of　the　cylinder　was　closely　correlated　with　factors　such　as　the　adhesive　force,　the　static　friction　coefficient,　and　the　rotational　speed　and　inclination　angle　of　the　cylinder.　2）The　static　friction　coefficient　between　tobacco　particles　and　the　cylinder,　as　well　as　the　ratio　of　the　adhesive　force　between　a　tobacco　particle　and　the　spiker　surface　versus　that　between　a　tobacco　particle　and　the　inner　wall　of　the　cylinder,　significantly　affected　the　minimum　adhesive　force　required　for　tobacco　particle　adhesion.　Meanwhile,　the　rotational　speed　of　the　cylinder　substantially　impacted　the　projecting　trajectory　of　tobacco　particles.　3）When　the　viscosity　of　the　casing　was　randomly　adjusted　and　increased　from　0.001　to　0.700　kg/ms,　the　trajectory　and　mass　fraction　distribution　of　casing　particles　remained　basically　unchanged,　though　the　average　particle　size　of　the　casing　decreased.　4）By　adjusting　the　casing　nozzle　parameters,　the　amount　of　tobacco　buildup　on　the　inner　wall　of　the　cylinder　could　be　reduced　to　≤0.32　kg　per　batch.　The　findings　in　this　research　aid　cigarette　factories　to　reduce　material　loss　and　improve　production　efficiency.　©　2025　Editorial　Office　of　Tobacco　Science　and　Technology.　All　rights　reserved.