- -Y+ values(https://www.cfd-online.com/Forums/fluent/195707-y-values.html) gushNovember 15, 2017 02:41 Y+ values Hi, it is adviced that y+ values should be around 1 when enhanced wall treatment is selected. We can check that value from “adapt” section. But it is the max valu...
This is the picture show the y+ in my calculation. Specilally, in the nozzle region, the y+ in the flow direction is almost less than 1, except some points go to 1.5 (block2 wall and block2 side wall). So how do you think about this y+ value? How will it influent the solution...
Take the y+ value as 1 and fluid to be air. Enter freestream velocity, UfUf = 10 m/s. The density and dynamic viscosity of the air are pre-filled for you. Enter the length of boundary layer, L. Give in the dimensionless distance, y+. The Reynold's number, RexRex is: Rex=ρ ...
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Now you can compute wall spacing while at your desk or while on the road with the Y+ Calculator for iPhone, iPad, or Android. This free app is a handy tool for calculating the grid spacing at a wall to achieve a target y+ value for viscous computational fluid dynamics (CFD) compu...
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The value of Y-plus in fluent was printed for this case, which shows that the first layer height near-wall has been hit correctly: As can be seen from the figure above, the Y-plus value ranges between 30 and 300. By repeating the procedure for Y-plus 1, the value of y is 0.000022...
⾸先，在 CFD中应⽤湍流模型并不⼀定需要使⽤壁⾯函数，在粘性⽀层中可以对 N-S⽅程直接求解。在粘性⽀层中，速度梯度很⼤，vorticity不为零，所以要直接求解，就必须在粘性⽀层中布置较多节点，⼀般要 10层以上，这就是⼀般的低 Re数湍流模型。当然这样将占⽤较多的计算资源。⽽在...
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