I would like to add a pressure inlet to a problem, where the boundary condition pressure is specified as a function of time. This is for a transient internal flow problem. Would you happen to have a simple example of this?
|
Transient Boundary Conditions
There are two ways you can specify transient boundary conditions: 1. transient profile with a format similar to the standard boundary profiles described in Section 6.24 of the FLUENT 5 User's Guide 2. transient profile in a tabular format !! For both methods, the boundary condition will vary only in time; it must be spatially uniform. !! 1. Standard Transient Profiles ----------------------------------------------- The format of the standard transient profile file (based on the profiles described in Section 6.24 of the FLUENT 5 User's Guide) is ((profile-name transient n periodic?) (field_name-1 a1 a2 a3 .... an) (field_name-2 b1 b2 b3 .... bn) . . . . (field_name-r r1 r2 r3 .... rn)) One of the field_names should be used for the time field, and the time field section must be in ascending order. The periodic? entry indicates whether or not the profile is time-periodic. Set it to 1 for a time-periodic profile, or 0 if the profile is not time-periodic. An example is shown below: ((sampleprofile transient 3 1) (time 1 2 3 ) (u 10 20 30 ) ) You can read this file into FLUENT using the Boundary Profiles panel or the File/Read/Profile... menu item. Define >> Profiles... File >> Read >> Profile... See Section 6.25.3 in the FLUENT 6 User's Guide for details. 2. Tabular Transient Profiles -------------------------------------------- The format of the tabular transient profile file is profile-name n_field n_data periodic? field-name-1 field-name-2 field-name-3 .... field-name-n_field v-1-1 v-2-1 ... ... ... ... v-n_field-1 v-1-2 v-2-2 ... ... ... ... v-n_field-2 . . . . . v-1-n_data v-2-n_data ... ... ... ... v-n_field-n_data One of the field-names should be used for the time field, and the time field section must be in ascending order. The periodic? entry indicates whether or not the profile is time-periodic. Set it to 1 for a time-periodic profile, or 0 if the profile is not time-periodic. An example is shown below: sampletabprofile 2 3 1 time u 1 10 2 20 3 30 This file defines the same transient profile as the standard profile example above. You can read this file into FLUENT using the read-transient-table text command. file/read-transient-table |
||
|