# create waves

 Register Blogs Members List Search Today's Posts Mark Forums Read

 October 7, 2008, 09:21 create waves #1 aginor Guest   Posts: n/a how i can create sea waves? i what to make messurements about some forces. i find in the help: Example: Creating a Wave-Maker Type Boundary but i dont know what to do it

 October 7, 2008, 10:59 I've simulated linear wave boundary #2 Byongjun Park Guest   Posts: n/a Do you mean simulating like this? * http://cometrue.kr/66 : 2D Wave Flume * http://cometrue.kr/75 : 3D Detached Breakwater I've simulated wave boundary with version 9.2, but it was linear wave. The input file cannot be built up in GUI environment. To make wave boundary you must edit "prepin.inp" by text editor program like "NOTEPAD" or "Ultra Editor". For example, ... \$bcdata wl=6, iwavel=1, waveamp(1)=4., wavefre(1)=12., wr=8, wb=2, wt=5, pbct(1,6)=0., fbct(1,6)=0., \$end ... \$fl nfls=1, fzh(1)=15., remark='initial water level', \$end ... If you want input "wavenum(n)" at left boundary, must delete "wavefre(n)". Please refer to user manual, and good luck! P.S. (1) If your solver is earlier than version 9.0, it may be define as time series boundary. (2) To make irregular wave boundary, you have to complie user subroutine with FORTRAN(Intel). The example source code is uploaded in FLOW-3D user site, but I didn't try it yet. (I'd like to compare with CADMAS-SURF.)

 October 7, 2008, 11:43 Re: I've simulated linear wave boundary #3 MAB Guest   Posts: n/a Hi Byonggjun. I like your animations of wave's. I am going to use the new version9.3 for generating waves together with GMO model to calculate the rigid bodies displacement. i am sure your advice in modelling linear waves would very helpfull. Could you tell that what is the total time taken by flow-3D for these animations. are these 2D or 3D cases? Thanks MAB

 October 7, 2008, 12:34 Re: I've simulated linear wave boundary #4 MAB Guest   Posts: n/a Also which package you have used to make this animations. Have you used Flow-3D postprocessor. or anyother package for making animations? Thanks

 October 7, 2008, 15:26 Re: I've simulated linear wave boundary #5 aginor Guest   Posts: n/a Byongjun Park, i make several experiments but it doesnt work. can you sent me a very simple file with waves? one prepin file. and i will tray to make my change. i see your animation. very good work!!!!

 October 7, 2008, 20:39 It taken 2D 13H 13M 52S. #6 Byongjun Park Guest   Posts: n/a In the case of "2D Wave Flume", it taken 2D 13H 13M 52S. In fact, the simulation was done by 3D. If the number of Y-Dir. grid set to 1, it might be over several hours. My hardware Spec. - CPU : Intel(R) Core(TM)2 Quad CPU @ 2.66GHz - RAM : 8GB (2GB * 4) - OS : Microsoft Windows XP(64bit) - Ver. : 9.2.1 - I use SMP version. So it works parallel mode Test Condition - Num. of grid : 1177600 - X=-100~100, Y=-4~4, Z=0~23 - Amplitude=2m, Frequancy=10.12sec - Mean water level=15m P.S. I heard that version 9.3 can inport STL solid as GMO in post processing. http://cometrue.kr/98 http://cometrue.kr/99

 October 7, 2008, 20:45 I used "Flash Slider" #7 Byongjun Park Guest   Posts: n/a In order to upload result of simulation at my BLOG as animation, I used "Flash Slider". You can download at this URL. http://www.flashslider.com/download/fs_setup.exe

 October 7, 2008, 20:56 Please send me your input file #8 Byongjun Park Guest   Posts: n/a Sorry, I don't know your e-mail address and how to attach achive files in this forum environment. If you send me your input file, I check & edit your input file and I will send modified input file. P.S. I live in Korea(GMT+09:00).

 October 8, 2008, 05:06 Re: It taken 2D 13H 13M 52S. #9 MAB Guest   Posts: n/a Thanks Byongjun!! I have same hardware as yours. How long it takes for 3D case? Are you using outflow boundary at outlet. What do you think about this outflow and Continuative boundaries? Many Thanks in Advance

 October 8, 2008, 08:17 In order to consider reflection wave... #10 Byongjun Park Guest   Posts: n/a Because of reflection wave, I used outflow condition(8) with fluid height(mean water level) at right boundary. I didn't try continuative condition, but I guess continuative condition can break reflection wave, too. Now, I'm simulating the intake of power plant at Gunsan, Korea, so I cannot try to simulate the case of continuative condition. If you have spare time and can try it as 2D simulation, please tell me the comparison results. ^_^ I remember the simulation of detached breakwater(3D) required more times and that was my first simulation of 3D wave generating. Because I erased result file, I don't know elapsed time. But it was very interesting.

 October 8, 2008, 13:04 Re: I've simulated linear wave boundary #11 kyunghwan Guest   Posts: n/a Hi, This is wave make sample input for v9.2. good luck! --------------------------------------------------- RF01 T=1.4, H=0.05 \$xput remark='units are ...', twfin=28., itb=1, gz=-9.80, ipdis=1, apltdt=0.2, hpltdt=0.01, pltdt=100., delt=1.0e-4, dtmin=1.0e-10, autot=2., ifvisc=1, impadv=1, ifvis=4, tlen=0.007, igmres=1, \$end \$limits \$end \$props rhof=1000., mu1=0.001, units='si', \$end \$scalar \$end &bcdata wl=6, wr=8, flhtr=0.3, wt=5, fbct(1,6)=0.0, flhtl=0.3, iwavel=1, waveamp(1)=0.025, wavefre(1)=1.0, waveh(1)=0.45, / &mesh nxcelt=2500, nycelt=1, py(1)=0.0, py(2)=0.1, nzcelt=50, px(1)=-8.0, px(2)=0.0, pz(1)= 0.0, pz(2)= 0.3, pz(3)=0.5, px(3)=10.0, sizex(1)=0.0, px(4)=17.0, px(5)=17.1, px(6)=17.2, px(7)=17.3, px(8)=17.4, px(9)=17.5, px(10)=17.6, px(11)=17.7, px(12)=17.8, px(13)=17.9, px(14)=18., / \$obs avrck=-5.1, \$end \$fl nfls=1, fzh(1)=0.3, flht=0.3, \$end \$bf \$end \$temp \$end \$motn \$end \$grafic anmtyp(1)='f', anmtyp(2)='p', anmtyp(3)='vel', anmtyp(4)='srfht', \$end \$parts \$end ------------------------------------------

 October 10, 2008, 05:38 Re: I used "Flash Slider" #12 MAB Guest   Posts: n/a Thanks Byongjun !!! You used flash to upload your simulations .. but which package you used for making these animations, Flow-3D's postprocessor or TecPlot or something else.?

 October 11, 2008, 20:48 Just making a animation... #13 Byognjun Park Guest   Posts: n/a When I made a animation from simulation results, I used post-precessor of FLOW-3D, but it had some time lag in case of large flame and couldn't change resolution. So I used bmp2avi(It works in DOS prompt), I found some time lag, too. Receltly, I use img2avi. It works in Windows Env. To batch resizing(changing resolution) of frame cuts, I use other freeware(I use PhotoWORKS). Tecplot 360 2008, FieldView v12 are good post-processor for CFD, but these S/W are not require in case of making a animation, only.