# Step-by-Step Tutorial Session 1 - Front Wing Design Study (Part 2) **URL:** \ **Category:** Formula Student/SAE Workshop - 2017\ **Created:** [September 4, 2017, 9:45am UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155 "2017-09-04T09:45:23Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![drodriguez32](https://www.simscale.com/forum/user_avatar/www.simscale.com/drodriguez32/32/14276_2.png) [@drodriguez32](https://www.simscale.com/forum/u/drodriguez32)\ **Post date:** [September 4, 2017, 9:45am UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/1 "2017-09-04T09:45:23Z")
## Link to part 1 of the tutorial: [Step-by-Step Tutorial Session 1 - Front Wing Design Study (Part 1)](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-1/78755) * * * ## Introduction Welcome to the second part of the step-by-step tutorial for the simulation of a Formula SAE front wing. In this part of the tutorial we will show you how to do the post processing directly in SimScale, and we will dive into some of the results so that we can compare both wing setups. * * * ## Post-processing ![](https://www.simscale.com/forum/uploads/default/original/2X/7/7425de8cb7db15799756f2ccd9d13e1b672f5683.png) When your simulation is completed, proceed to **Post-Processor** tab in order to post-process your results. We will show the post-processing only for the first simulation results. You can then follow the same steps in order to post-process other configuration results ![](https://www.simscale.com/forum/uploads/default/original/2X/5/58461866e2929f47fa4b7a6ae7c18d5921bfef13.png) Once in **Post-Processor** , click on **Solution fields** under **Run-Standard** in order to load the results in the viewer. Due to fine mesh it can take up to 5 minutes to load the results in to the viewer. ### Filters/Visualization #### Slice For faster and efficient reviewing of the results, we will use slice filter. In order to add the filter, do the following: ![](https://www.simscale.com/forum/uploads/default/original/2X/e/eae7cab1d2798fde889ae5d1f166ac4077ffbc02.png) Go to **Add Filter** and select **Slice** ![](https://www.simscale.com/forum/uploads/default/original/2X/4/426cdf3e0e58d36556dd043e26605cc477513756.png) 1. Change **Origin** middle value i.e. y value to **0.6** 2. Change **Normal** to **(0,1,0)** 3. Uncheck **Show Plane**. 4. Click **Apply** to save the changes. 5. Next set camera orientation to +Y from the **View** tool over the viewer to get a proper view. _ **Velocity** _ ![](https://www.simscale.com/forum/uploads/default/original/2X/3/3a4d3ff46c86c3d5f5522a27cc2a73f4e7562280.png) Change the **Field** to **U [point-data]** in order to see the velocity field. Zoom the results with the mouse roller and drag from middle mouse button to get a reasonable view. Turn on the color bar and drag it by holding mouse left button to the bottom. _ **Pressure Coefficient** _ ![](https://www.simscale.com/forum/uploads/default/original/2X/e/ebabd0638e52366539d81e703c746d6790d5fd93.png) Next we will plot the pressure coefficient. Since this field doesn’t exist, we need to create one. First uncheck the colorbar ( **important** ; if you don’t do it, you may end up with two different colorbars in the next step) then select **Calculator** from **Add Filter**. ![](https://www.simscale.com/forum/uploads/default/original/2X/1/1e31bbaf588df45d5c1f945b083ac5fb758b8b76.png) Once the calculator filter is added: 1. Change the **Result Array Name** and **Function** to **Cp** and **(p-6.2)/(0.5 \* 20 \* 20)** respectively. 2. Click **Apply** to create a pressure coefficient field. 3. Change **Field** to **Cp[point-data]** to see the results. #### Streamlines ![](https://www.simscale.com/forum/uploads/default/original/2X/c/ce655a184dc6262b4744994d5e32bbc1d69c6fd4.png) Click on the small eye next to the slice and the calculation to hide those filters. Then right click on **Solution Fields** under _Run-Standard_ and click on **Add result to viewer**. This can take some time. ![](https://www.simscale.com/forum/uploads/default/original/2X/2/25de0d9294060800a28fc91507b3fa0088cebdaf.png) When it loads, click on the new solution field and under _Mesh regions_ select all the faces for the wing (no boundingBox# should be selected). In this case it should be just two (solid\_0\_FWing and solid\_0\_flap). Click on **Apply**. This will load into the viewer the wing and not the air. When the wing loads, select **Solid color** for the _field_. ![](https://www.simscale.com/forum/uploads/default/original/2X/7/75d0af1c409c5d4c1a829dea483e75027ec575d4.jpg) Click on the previous _Run-Standard_ (the one that has the slices and calculator), select **Add Filter** and then select **Stream tracer**. You are free to play around with the _Center_ and _Number of Points_ to get a visualization you like. You can also choose what field you want to visualize, and remember to turn on the color bar. For this case we used: - Center: (1.2 , 0.6 , 0.1) - Number of points: 100 - Radius: 0.15 - Field: U [point-data] #### Pressure distribution on wing ![](https://www.simscale.com/forum/uploads/default/original/2X/0/09484d3c089cef240b66f237519c44ca1fe59cac.png) Hide the Stream Tracer by clicking on the eye to the left of it. ![](https://www.simscale.com/forum/uploads/default/original/2X/d/dc659466b578808c49c1f05d7121490873bf5827.jpg) Now click on the “Run-Standard” that corresponds to the wing, and for _Field_ select **p [point-data]**. This will show you the pressure distribution on the surface of the wing so you can see where the most downforce is being generated. If you select **U [point-data]** for the _Field_ the whole wing will look blue. This is because at the surface of the car the air is at a complete standstill. ### Additional Features #### Screenshot ![](https://www.simscale.com/forum/uploads/default/original/2X/f/f1d217c49ca68dd5f118357063f937c6c7636ba3.jpg) If you want to take a screenshot of your results, click on the camera icon under **View** tools. Your screenshot will appear under **Result Evaluation** section. #### Save State ![](https://www.simscale.com/forum/uploads/default/original/2X/3/341d856069ed3825eea767c57945beec1ee9a773.jpg) Furthermore, in order to save the state for later use, click on the **Save State** button. A window will pop up, give a reasonable name e.g. **Saved state - Standard** (optional) in this case. Your saved state will also appear under **Result Evaluation** section. #### Area Averages ![](https://www.simscale.com/forum/uploads/default/original/2X/a/ae37023ae41418f1adcef321ce392b6cc2745c78.png) Lastly to see the plotted data requested beforehand during the simulation setup, switch over to **WingMain** under the **Force plot**. This data will give you information on the lift and drag being produced by the wing. For future reference: if these plots haven’t reached a stable value, your simulation hasn’t reached the steady state. * * * ## Homework Submission   **Homework Deadline** : The homework deadline has been extended until **September, 26th 11:59 pm CEST** #### [Click Here to Submit your Homework](https://marketing.simscale.com/acton/form/14483/00d1:d-0001/1/-/-/-/-/index.htm) * * * ## Recommendations About Comments If you run into issues during your process, before adding a comment to the thread please consider the following: 1. Go over the tutorial one last time and compare it to your setup. Is everything the same? 2. Go over the existing comments. Maybe someone has had the same problem and it’s already solved. 3. Is there an actual error? Or is it taking a long time to load? a. If it seems to be a loading issue, please give it some time or refresh the page. Sometimes due to the internet connection the platform may seem slow. If it’s a new issue that you can’t solve, please outline the issue as specifically as possible and include a link to your project. This will help us figure out what is going on faster and thus we can get back to you faster. * * * ## Results ### Animation: U [m/s] - X Normal ![](https://www.simscale.com/forum/uploads/default/original/2X/0/03e924d10e8072d7bc3a7747b69e448e4afe5a27.png) ![](https://www.simscale.com/forum/uploads/default/original/2X/5/5e4ab055fb990344e2debb9834a6467a8376a91d.png) ![](https://www.simscale.com/forum/uploads/default/original/2X/4/4555929cfa818e01b96268be2eb9fb2ebbfa8305.png) ![](https://www.simscale.com/forum/uploads/default/original/2X/f/f6222cefd90e479aac152671fa35db1c30c4b6b9.png) ---
**Author:** ![davidklein](https://www.simscale.com/forum/letter_avatar/davidklein/32/5_5575768a8748004e209b776fc1b2916d.png) [@davidklein](https://www.simscale.com/forum/u/davidklein)\ **Post date:** [September 21, 2017, 7:18am UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/4 "2017-09-21T07:18:17Z")
Hi, I am not able to open the Simulation Results from both (the standard and the higjh downforce) Models. It always gets stuck at the screen pictured below, when I try to open the solution fields. Is anybody having the same problem? ![Loading_error Simsclae](https://www.simscale.com/forum/uploads/default/original/2X/c/c08dce709c3b27470c7531ba4c5c558d4b84af63.PNG) I tried reloding the page and waiting for hours with no success. I am having this problem since yesterday 4p.m. ---
**Author:** ![jvinas](https://www.simscale.com/forum/letter_avatar/jvinas/32/5_5575768a8748004e209b776fc1b2916d.png) [@jvinas](https://www.simscale.com/forum/u/jvinas)\ **Post date:** [September 21, 2017, 8:09am UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/5 "2017-09-21T08:09:18Z")
Same for me ---
**Author:** ![pkrizan](https://www.simscale.com/forum/letter_avatar/pkrizan/32/5_5575768a8748004e209b776fc1b2916d.png) [@pkrizan](https://www.simscale.com/forum/u/pkrizan)\ **Post date:** [September 21, 2017, 8:16am UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/6 "2017-09-21T08:16:07Z")
same here … ---
**Author:** ![Torque](https://www.simscale.com/forum/letter_avatar/torque/32/5_5575768a8748004e209b776fc1b2916d.png) [@Torque](https://www.simscale.com/forum/u/Torque)\ **Post date:** [September 21, 2017, 8:33am UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/7 "2017-09-21T08:33:09Z")
same problem ---
**Author:** ![jousefm](https://www.simscale.com/forum/user_avatar/www.simscale.com/jousefm/32/34908_2.png) [@jousefm](https://www.simscale.com/forum/u/jousefm)\ **Post date:** [September 21, 2017, 9:05am UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/8 "2017-09-21T09:05:18Z")
Hi @davidklein, @jvinas, @pkrizan & @Torque! The team is looking into it and try to fix this as soon as possible. Sorry for the lost productivity. Will get back to you once it is fixed. Best, Jousef ---
**Author:** ![jkuzniewski](https://www.simscale.com/forum/letter_avatar/jkuzniewski/32/5_5575768a8748004e209b776fc1b2916d.png) [@jkuzniewski](https://www.simscale.com/forum/u/jkuzniewski)\ **Post date:** [September 21, 2017, 11:43am UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/9 "2017-09-21T11:43:25Z")
Hi I have the same problem as the guys above. Do you know when is this issue going to be fixed? Best, Jakub ---
**Author:** ![jd\_az](https://www.simscale.com/forum/letter_avatar/jd_az/32/5_5575768a8748004e209b776fc1b2916d.png) [@jd\_az](https://www.simscale.com/forum/u/jd_az)\ **Post date:** [September 21, 2017, 12:42pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/10 "2017-09-21T12:42:12Z")
Same problem… ---
**Author:** ![kshitij](https://www.simscale.com/forum/letter_avatar/kshitij/32/5_5575768a8748004e209b776fc1b2916d.png) [@kshitij](https://www.simscale.com/forum/u/kshitij)\ **Post date:** [September 21, 2017, 12:49pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/11 "2017-09-21T12:49:04Z")
Hi I too have the same problem as the people above. Will this problem hamper our homework? Can I submit the homework without post processing? ---
**Author:** ![nishank\_a](https://www.simscale.com/forum/letter_avatar/nishank_a/32/5_5575768a8748004e209b776fc1b2916d.png) [@nishank\_a](https://www.simscale.com/forum/u/nishank_a)\ **Post date:** [September 21, 2017, 1:13pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/12 "2017-09-21T13:13:16Z")
Same problem. ---
**Author:** ![sshahane19](https://www.simscale.com/forum/letter_avatar/sshahane19/32/5_5575768a8748004e209b776fc1b2916d.png) [@sshahane19](https://www.simscale.com/forum/u/sshahane19)\ **Post date:** [September 21, 2017, 1:22pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/13 "2017-09-21T13:22:50Z")
Has the problem been fixed?? I cant post process my project yet. ---
**Author:** ![walidabdelraouf](https://www.simscale.com/forum/user_avatar/www.simscale.com/walidabdelraouf/32/22357_2.png) [@walidabdelraouf](https://www.simscale.com/forum/u/walidabdelraouf)\ **Post date:** [September 21, 2017, 1:30pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/14 "2017-09-21T13:30:00Z")
The same thing with me 5 hrs ago. ---
**Author:** ![ja\_amortegui](https://www.simscale.com/forum/letter_avatar/ja_amortegui/32/5_5575768a8748004e209b776fc1b2916d.png) [@ja\_amortegui](https://www.simscale.com/forum/u/ja_amortegui)\ **Post date:** [September 21, 2017, 2:02pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/15 "2017-09-21T14:02:32Z")
Hi. I have the same problem. ---
**Author:** ![makr0041](https://www.simscale.com/forum/letter_avatar/makr0041/32/5_5575768a8748004e209b776fc1b2916d.png) [@makr0041](https://www.simscale.com/forum/u/makr0041)\ **Post date:** [September 21, 2017, 2:04pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/16 "2017-09-21T14:04:39Z")
Same here. ---
**Author:** ![mhomma](https://www.simscale.com/forum/letter_avatar/mhomma/32/5_5575768a8748004e209b776fc1b2916d.png) [@mhomma](https://www.simscale.com/forum/u/mhomma)\ **Post date:** [September 21, 2017, 2:09pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/17 "2017-09-21T14:09:32Z")
Same here. What are we supposed to do with our homework then? ---
**Author:** ![Audun\_Br](https://www.simscale.com/forum/letter_avatar/audun_br/32/5_5575768a8748004e209b776fc1b2916d.png) [@Audun\_Br](https://www.simscale.com/forum/u/Audun_Br)\ **Post date:** [September 21, 2017, 2:41pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/18 "2017-09-21T14:41:59Z")
Same here ---
**Author:** ![brendan\_a\_b](https://www.simscale.com/forum/letter_avatar/brendan_a_b/32/5_5575768a8748004e209b776fc1b2916d.png) [@brendan\_a\_b](https://www.simscale.com/forum/u/brendan_a_b)\ **Post date:** [September 21, 2017, 2:54pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/19 "2017-09-21T14:54:55Z")
Hi simscale people, also getting the problem, upon refresh I got this: " The proxy server received an invalid response from an upstream server. The proxy server could not handle the request GET /postproc-ng-static/apps/SimScale/embed.html. Reason: Error reading from remote server " in the ‘view window’ part of the dashboard, where the mesh/whatever would usually be. Hopefully this might be of some use. Congrats btw on last week’s webinar. It was great, and you’ve clearly got the pull to rope in such a good guest presenter. ---
**Author:** ![pgatto](https://www.simscale.com/forum/letter_avatar/pgatto/32/5_5575768a8748004e209b776fc1b2916d.png) [@pgatto](https://www.simscale.com/forum/u/pgatto)\ **Post date:** [September 21, 2017, 4:31pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/20 "2017-09-21T16:31:24Z")
I am also still getting stuck on this section. The simulation fields will not load in either standard or high downforce ---
**Author:** ![llopezmeyer](https://www.simscale.com/forum/letter_avatar/llopezmeyer/32/5_5575768a8748004e209b776fc1b2916d.png) [@llopezmeyer](https://www.simscale.com/forum/u/llopezmeyer)\ **Post date:** [September 21, 2017, 4:47pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/21 "2017-09-21T16:47:04Z")
I’m having the same problem! ---
**Author:** ![alex\_liciu](https://www.simscale.com/forum/letter_avatar/alex_liciu/32/5_5575768a8748004e209b776fc1b2916d.png) [@alex\_liciu](https://www.simscale.com/forum/u/alex_liciu)\ **Post date:** [September 21, 2017, 4:56pm UTC](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155/22 "2017-09-21T16:56:45Z")
I experience the same problem [Next page](https://www.simscale.com/forum/t/step-by-step-tutorial-session-1-front-wing-design-study-part-2/79155.md?page=2)