deborah.1 (1569B)
1 .Dd $Mdocdate$ 2 .Dt DEBORAH 1 3 .Os 4 .Sh NAME 5 .Nm deborah 6 .Nd dimensionless analysis of grain-fluid interaction 7 .Sh SYNOPSIS 8 .Nm 9 .Op Fl d Ar grain-size 10 .Op Fl h 11 .Op Fl i Ar fluid-viscosity 12 .Op Fl k Ar fluid-permeability 13 .Op Fl P Ar grain-compressibility 14 .Op Fl p Ar grain-porosity 15 .Op Fl s Ar applied-shear-vel 16 .Op Fl v 17 .Sh DESCRIPTION 18 The 19 .Nm 20 utility outputs the modified Deborah number. 21 Values much smaller than 1 correspond to instantaneous fluid-pressure 22 equilibration, and numbers greater than 1 imply that fluid-pressure 23 effects are expected. 24 .Pp 25 The arguments mirror the program 26 .Xr cngf-pf 1 27 and are as follows: 28 .Bl -tag -width Ds 29 .It Fl d Ar grain-size 30 Granular material representative grain size [m] (default 0.04). 31 .It Fl i Ar fluid-viscosity 32 Fluid dynamic viscosity [Pa*s] (1.787e-3). 33 .It Fl k Ar fluid-permeability 34 Darcian intrinsic permeability of granular material [m^2] (default 35 1.9e-15). 36 .It Fl P Ar grain-compressibility 37 Granular material compressibility [Pa^-1] (default 1e-8). 38 .It Fl p Ar grain-porosity 39 Granular material porosity [-] (default 0.25). 40 .It Fl s Ar applied-shear-vel 41 Shear the material under constant velocity [m/s] instead of a friction value. 42 .It Fl v 43 Show version information. 44 .El 45 .Pp 46 The result is written to stdout. 47 .Sh EXIT STATUS 48 .Nm 49 exits 0 on success, and >0 if a runtime error occurs: 50 .Pp 51 .Bl -tag -width Ds -compact 52 .It 0 53 successful exit 54 .It 1 55 unspecified error 56 .It 2 57 .Xr pledge 2 58 error 59 .El 60 .Sh SEE ALSO 61 .Xr cngf-pf 1 , 62 .Xr max_depth_simple_shear 1 , 63 .Xr shear_flux 1 64 .Sh AUTHORS 65 .An Anders Damsgaard Aq Mt anders@adamsgaard.dk