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Fluent DPM unsteady injection file read issues |
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March 10, 2021, 13:20 |
Fluent DPM unsteady injection file read issues
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#1 | ||
New Member
ergk-10
Join Date: Mar 2021
Posts: 3
Rep Power: 5 |
Hello
I am trying to get an unsteady DPM simulation running using a .inj file and am running into errors regarding the injection file formatting. In the documentation (2020-R2) the following is said of unsteady .inj formats: Quote:
Code:
(z=4 13) ( x y z u v w diameter t parcel-mass mass n-in-parcel time flow-time name) ((2.958076e+00 -8.214376e-01 8.320422e-01 -6.094111e-02 7.928544e-02 0.000000e+00 1.000000e-02 2.930000e+02 1.000000e-01 1.000000e-01 1.000000e+00 0.000000e+00 0.000000e+00) injection0:0 ) ((2.816757e+00 -1.182306e+00 1.249779e+00 -4.697874e-02 8.827796e-02 0.000000e+00 1.000000e-02 2.930000e+02 1.000000e-01 1.000000e-01 1.000000e+00 0.000000e+00 0.000000e+00) injection0:1 ) Quote:
To try and see where I was going wrong I manually created some dummy injection points and wrote the resulting .inj file out, getting this (some bits omitted): Code:
((injection-1 ((type . inert) (injection-type . group) (cone-type . solid-cone) (numpts . 5) (dpm-fname . " ") (surfaces . #f) (boundary -1) (stochastic-on . #f) (random-eddy-on . #f) (ntries . 1) (time-scale-constant . 0.15) (cloud-on . #f) (cloud-min-dia . 0.) (cloud-max-dia . 100000.) ... (x-pos2 . 3.2) (y-pos . -1.75) (y-pos2 . -1.75) (z-pos . 0.5) (z-pos2 . 0.5) (ff-center-x . 0) (ff-center-y . 0) (ff-center-z . 0) (ff-virtual-origin-x . 0) (ff-virtual-origin-y . 0) (ff-virtual-origin-z . 1) (ff-normal-x . 1) (ff-normal-y . 0) (ff-normal-z . 0) (x-vel . 0) (x-vel2 . 0.) (y-vel . 0.5) (y-vel2 . 0.5) (z-vel . 0) (z-vel2 . 0.) (x-ang-vel . 0) (x-ang-vel2 . 0.) (y-ang-vel . 0) (y-ang-vel2 . 0.) (z-ang-vel . 0) (z-ang-vel2 . 0.) (atomizer-x-axis . 0) (atomizer-y-axis . 0) (atomizer-z-axis . 1) (diameter . 1e-06) (diameter2 . 1e-06) (temperature . 300) (temperature2 . 300.) (flow-rate . 9.999999999999999e-21) (flow-rate2 . 9.999999999999999e-21) (unsteady-start . 0) (unsteady-stop . 0) (start-at-flow-time-in-unsteady-inj-file . 0) (interval-to-repeat-in-unsteady-inj-file . 0) (unsteady-ca-start . 0) (unsteady-ca-stop . 0) (vapor-pressure . 10000) (inner-diameter . 0.001) (outer-diameter . 0.005) (half-angle . 0.34906585) (plain-length . 0.001) (plain-corner-size . 1e-05) (plain-const-a . 4.9) (pswirl-inj-press . 1000000) (airbl-rel-vel . 100) (effer-quality . 0.08500000000000001) (effer-t-sat . 373) (ff-orifice-width . 0.001) (phi-start . 0) (phi-stop . 6.283185310001) (sheet-const . 12) (lig-const . 0.5) (effer-const . 0.3300000000000001) (effer-half-angle-max . 0.261799388) (ff-sheet-const . 3) (atomizer-disp-angle . 6) (x-axis . 0) (y-axis . 0) (z-axis . 1) (vel-mag . 0) (ang-vel-mag . 0) (cone-angle . 0) (inner-radius . 0) (radius . 0) (swirl-frac . 0) (total-flow-rate . 9.999999999999999e-21) (total-mass . 9.999999999999999e-21) (rr-min . 1e-06) (rr-max . 0.0001) (rr-mean . 1e-05) (rr-spread . 3.5) (rr-numdia . 10) (x-posr . 0) (y-posr . 0) (z-posr . 0) (x-posu . 0) (y-posu . 0) (z-posu . 0)))) Any insight appreciated! |
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March 16, 2021, 02:06 |
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#2 |
New Member
Weiqi_Guo
Join Date: Mar 2021
Posts: 7
Rep Power: 5 |
Dear ergk-10,
I wonder if you have solved this problem?I have the same problem as you.I am looking for a solution and will communicate with you if I make any progress. |
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March 16, 2021, 07:33 |
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#3 |
New Member
Weiqi_Guo
Join Date: Mar 2021
Posts: 7
Rep Power: 5 |
I've tried a number of methods, including.inj files that others have been successful with, and this problem also occurs.I'm also using Fluent (2020-R2), and I think this might be a bug with this version.I found another way to be wary in the Help document (2020-R2) '25.3.21. Point Properties for Transient Injection'.I'm trying.The following is the content of a document generated by the software itself when I calculated steady state. You can also try it:
PHP Code:
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March 17, 2021, 11:52 |
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#4 |
New Member
ergk-10
Join Date: Mar 2021
Posts: 3
Rep Power: 5 |
I've not managed to make any progress with this yet, I may be able to test on another version in which case I'll let you know if that works!
I'll give that example a go too! |
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Tags |
dpm, file, fluent, injection, unsteady |
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