基础知识:扰动流LS-DYNA模拟显示扰动流输入甲板流体和边界条件提供Reynolds数5万分令流乱并提示使用扰动模型默认配置使用RANS可实现模型边界层网格选取约30Y+值数个其他扰动模型可试用并相应修改边界层网格用户可以研究回溯带对厚板的长度和影响//www.cannycloudtech.com/icfd/basics-examples/turbulence//www.cannycloudtech.com/@@site-logo/LS-DYNA-Examples-Logo480x80.png
基础知识:扰动流
LS-DYNA模拟显示扰动流输入甲板流体和边界条件提供Reynolds数5万分令流乱并提示使用扰动模型默认配置使用RANS可实现模型边界层网格选取约30Y+值数个其他扰动模型可试用并相应修改边界层网格用户可以研究回溯带对厚板的长度和影响
LS-DYNA模拟显示扰动流输入甲板流体和边界条件提供Reynolds数5万分令流乱并提示使用扰动模型默认配置使用RANS可实现模型边界层网格选取约30Y+值数个其他扰动模型可试用并相应修改边界层网格用户可以研究回溯带对厚板的长度和影响
扰动强度边缘
*DATABASE_BINARY_D3PLOT *KEYWORD *TITLE *DEFINE_CURVE_TITLE *ICFD_BOUNDARY_FREESLIP *ICFD_BOUNDARY_PRESCRIBED_PRE *ICFD_BOUNDARY_PRESCRIBED_VEL *ICFD_BOUNDARY_PRESCRIBED_TURBULENCE *ICFD_BOUNDARY_NONSLIP *ICFD_CONTROL_OUTPUT *ICFD_CONTROL_TAVERAGE *ICFD_CONTROL_TIME *ICFD_CONTROL_TURBULENCE *ICFD_DATABASE_DRAG *ICFD_DATABASE_TIMESTEP *ICFD_INITIAL *ICFD_MAT *ICFD_PART *ICFD_PART_VOL *ICFD_SECTION *INCLUDE *MESH_BL *MESH_SURFACE_ELEMENT *MESH_SURFACE_NODE *MESH_VOLUME *PARAMETER *END
18luck快乐彩Uniteds-LSSC-LSST-E-Mail-info@de-web:http://www.dyamore.de$ $X------------------------------------------------------------------------------ $X $X 1.运行文件原封不动$X Requires LS-DYNA MPP R9.0.0 (or higher) with double precision $X $X------------------------------------------------------------------------------ $# UNITS: (kg/m/s) $X------------------------------------------------------------------------------ $X *KEYWORD *TITLE ICFD Turbulent thick plate *INCLUDE mesh.k $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 $ $ $ PARAMETERS $ $ $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 *PARAMETER R T_end 2.0 R dt_plot 0.05 $ $--- Fluid $ R v_inlet 8.33 Rrho_fluid 1.22500 R mu_fluid 1.7895e-5 R dt_fluid 1e-4 R mu_turb 1e4 $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 $ $ $ ICFD CONTROL CARDS $ $ $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 *ICFD_CONTROL_TIME $# ttm dt &T_end &dt_fluid *ICFD_CONTROL_TURBULENCE $ RANS realizable k-epsilon $# tmod submcd wlaw 1 2 1 $ LES Smagorinsky $2 $ RANS Menter-SST $4,3 *ICFD_CONTROL_TAVERAGE $# dt 1 *ICFD_CONTROL_OUTPUT $# mslv 3 *ICFD_CONTROL_MESH $# mgsf mstrat 2dstruc 1 $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 $ $ $ ICFD PARTS/ SECTION/ MATERIAL $ $ $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 *ICFD_SECTION $# sid 1 *ICFD_MAT $# mid flg ro vis 1 1&rho_fluid &mu_fluid *ICFD_PART $# pid secid mid 1 1 1 *ICFD_PART $# pid secid mid 2 1 1 *ICFD_PART $# pid secid mid 3 1 1 *ICFD_PART $# pid secid mid 4 1 1 *ICFD_PART_VOL $# pid secid mid 10 1 1 $# spid1 spid2 spid3 spid4 1 2 3 4 $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 $ $ $ ICFD BOUNDARY/INITIAL CONDITIONS $ $ $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 *ICFD_BOUNDARY_PRESCRIBED_TURBULENCE $# pid vtype imp lcid 1 2 2 3 *ICFD_BOUNDARY_PRESCRIBED_VEL $# pid dof vad lcid 1 1 1 1 *ICFD_BOUNDARY_PRESCRIBED_VEL $# pid dof vad lcid 1 2 1 2 *ICFD_BOUNDARY_PRESCRIBED_PRE $# pid lcid sf death birth 2 2 *ICFD_BOUNDARY_FREESLIP $# pid 3 *ICFD_BOUNDARY_NONSLIP $# pid 4 *ICFD_INITIAL $# pid vx 0 &v_inlet *DEFINE_CURVE_TITLE Velocity inlet $# lcid sidr sfa sfo offa offo dattyp 1 &v_inlet $# a1 o1 0.0 1.0 10000.0 1.0 *DEFINE_CURVE_TITLE Pressure outlet $# lcid sidr sfa sfo offa offo dattyp 2 $# a1 o1 0.0 0.0 10000.0 0.0 *DEFINE_CURVE_TITLE inlet turbulent viscosity $# lcid sidr sfa sfo offa offo dattyp 3 &mu_turb $# a1 o1 0.0 1.0 10000.0 1.0 $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 $ $ $ ICFD MESH KEYWORDS $ $ $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 *MESH_VOLUME $# volid 8 $# pid1 pid2 pid3 pid4 1 2 3 4 *MESH_BL $# pid nelth blth blfe blst 4 2 0.006 1 $ For LES and possibly RANS k-w $$# pid nelth blth blfe blst $ 4 5 0.006 1e-4 2 $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 $ $ $ DATABASE (OUTPUT) $ $ $ $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8 *ICFD_DATABASE_DRAG $# pid 4 *ICFD_DATABASE_TIMESTEP $# outlv 1 *DATABASE_BINARY_D3PLOT &dt_plot *END