- -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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molecular diffusionY-shape micromixerA CFD simulation was carried out to investigate the mixing process in a Y-shape micromixer with the software Fluent 6.3. The definition of the "diffusion angle" is proposed to describe the molecular diffusion process associated with the flow at low Reynolds ...
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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