DWSIM-3.4/C2/Creating-a-material-stream-in-DWSIM/English-timed

Time	Narration
00:00	Welcome to the spoken tutorial on creating a material stream in DWSIM.
00:05	My name is Kannan Moudgalya.
00:07	In this tutorial, we are going to learn:
00:10	How to select chemical components
00:14	How to choose a thermodynamic package
00:17	How to choose units and values
00:19	And how to specify a material stream.
00:23	To record this tutorial, I am using DWSIM 3.4 windows version.
00:29	But this process is identical in Linux, Mac OS X and FOSSEE on ARM.
00:35	To practice this tutorial, you should have access to DWSIM.
00:39	Let us start with creating a new steady state simulation.
00:46	When DWSIM is opened, you see a startup window, such as this.
00:53	Click on Create new simulation
00:57	If a simulation wizard appears, cancel it.
01:02	On the top left, locate a field called Simulation.
01:08	Hover the mouse over the puzzle like button next to it.
01:14	You can see that it is known as Configure Simulation.
01:18	Press this button.
01:23	A Configure Simulation pop-up opens.
01:26	In some earlier versions, this pop-up opened automatically.
01:31	The lettering is very small and unreadable in this recording.
01:35	To address this, I will zoom in on the relevant portion of this screen only.
01:42	I have now rearranged the screen for better readability.
01:46	In the Component Search tab of this window, type "benzene".
01:59	Benzene appears in two rows. We are interested in the entry that has DWSIM as the database.
02:07	We will explain in another tutorial the significance of other databases.
02:13	Double click anywhere on this line.
02:17	You could have pressed the Add button also which is on the right hand side which we will see shortly.
02:23	You can see that Benzene is now selected.
02:27	I shall let you see it by shifting the pop-up window to the left.
02:40	Repeat this for toluene.
02:52	Let us select this. Let us add.
02:59	You can see that the component selection is completed.
03:04	I shall shift the window back to where it was.
03:12	We are now ready to choose Thermodynamics.
03:14	Let us go back to the slides.
03:18	Let us go to the next slide.
03:21	This slide has guidelines on how to choose thermodynamics.
03:24	Covering the theory behind this slide is beyond the scope of this tutorial.
03:30	As Benzene and Toluene form an ideal solution, we can choose Raoult's law.
03:35	Let us do this in DWSIM.
03:40	Locate the Thermodynamics tab on the left hand side. Click on it.
03:47	A sub-menu appears in the white space above.
03:51	Click on the Property Packages in the sub-menu.
03:56	Scroll down in this list and locate an option called Raoult's law.
04:03	Choose this by double clicking on it.
04:08	You will see Raoult's law appearing on the right hand side of the pop-up.
04:12	To see this, let me shift the pop-up to the left.
04:20	On the lower right hand corner of this pop-up, locate a button called Back to Simulation. Click on it.
04:28	The configure simulation pop-up gets closed and we are ready to do the simulation.
04:35	The canvas at the centre of this page is used to create flowsheets.
04:41	We will now create a material stream.
04:44	On the right hand side, you see an object palette.
04:49	It has a large collection of many useful chemical engineering objects.
04:55	You can scroll it and see what all are available.
05:01	Right at the top of this is the Material Stream object. Click it and drag it to the flowsheet.
05:12	At the desired place, remove your finger from the mouse to drop the stream.
05:19	You may leave it anywhere on this canvas.
05:21	You can also move the stream to another place later, if required.
05:25	Immediately after dropping the stream, a pop-up to enter compositions appears.
05:31	Notice that Mole Fraction is selected by default.
05:36	You can choose one of the other possibilities. But, I shall leave it as it is.
05:42	The chemicals that we already selected, appear here automatically.
05:49	Type 0.5 in the equilibrium composition of Toluene.
05:55	Press down-arrow.
05:57	Type 0.5 in the Equilibrium Composition of benzene.
06:02	Click Apply.
06:06	The total of the mole fractions appears on the right hand side.
06:12	If the total is not 1, DWSIM 'normalize's the entries, so that the total becomes 1.
06:19	But this may give some unpredictable values at times.
06:22	So, you yourself may want to ensure that the total comes to 1. Click the Close button.
06:31	You can always get back to the previous pop-up by double clicking on the stream.
06:36	Below the configure simulation button, notice a place to change the System of Units.
06:43	Let us click this menu and choose CGS System.
06:49	Let us now complete the specification of this stream.
06:52	Click on the stream icon in the flowsheet once; do not double-click it.
07:00	On the left hand side of the flowsheet, you will see the selected object window.
07:07	This window consists of Properties and Appearance tabs.
07:12	The properties tab shows all the properties of the stream. DWSIM assigns default values to all properties.
07:21	Let us first scroll up this page.
07:27	There are many ways to complete the specification of a material stream.
07:31	Press on Specification.
07:34	A down-arrow appears on the right hand side, press it.
07:40	The default is to specify pressure and temperature.
07:43	I shall leave it as it is.
07:45	I shall press the down-arrow once again to close the menu.
07:50	We see the number 25 already entered against the temperature.
07:55	By hovering the mouse over the Temperature, we see the units as degree Celsius.
08:02	Let us click to the right of this number.
08:07	It is an editable field. Let me delete it and enter 30.
08:15	Let us look at pressure next. I shall leave it at 1 atmosphere.
08:23	Let us specify the flowrate next.
08:26	We can specify- mass flowrate or molar flowrate or volumetric flowrate.
08:33	We will specify molar flowrate.
08:38	I shall delete the old value and enter 100.
08:47	Press Enter to save this change.
08:50	Units for this field are moles per second as we can see now.
08:56	It is possible to use a combination of units such as CGS and SI.
09:01	We will postpone this discussion to another tutorial.
09:05	Now the stream is fully defined.
09:08	DWSIM has given the name MSTR-004 to this stream automatically.
09:16	You may see some other name in your simulation, but do not worry about it.
09:21	As I am not happy with this automatically generated name, let me change it.
09:27	Under the selected Object window, click on the Appearance tab.
09:33	The Appearance tab is used to modify the visual appearance of the stream.
09:37	Click on the blank space beside Name and type Inlet1, after deleting this.
09:55	Click on the Name again.
09:58	You can see the name Inlet1 appearing below this stream in the flowsheet.
10:04	We will build on this material stream in the upcoming tutorials.
10:08	Let us go back to the slides.
10:13	We go to the next slide.
10:15	Let me summarize what we learnt in this tutorial.
10:19	We defined a material stream.
10:22	Chose chemical components.
10:24	Chose the property estimation package.
10:27	Completed specifications.
10:29	Assigned values and units.
10:32	Specified temperature, pressure and flow rate.
10:36	Pointed out many different options.
10:40	I would like to give some assignments now.
10:43	Choose Benzene and Toluene mole fractions that do not add up to 1.
10:48	Check how DWSIM normalizes when you press Apply.
10:53	Go to the page where you defined mole fractions.
10:57	Check what the normalize button does when the total is not 1.
11:02	Go to the page where we defined the molar flow rate.
11:05	DWSIM automatically displays equivalent flow rates in other units.
11:11	Check if these values are consistent.
11:16	Create a stream consisting of Benzene, Toluene and Xylene.
11:20	Carry out the previous assignments for this stream also.
11:26	This brings us to the end of this tutorial.
11:28	This video summarizes the Spoken Tutorial project.
11:33	If you do not have good bandwidth, you can download and watch it.
11:39	We conduct workshops using Spoken Tutorials; give certificates. Please contact us.
11:47	The Spoken Tutorial project is funded by NMEICT, MHRD, Govt. of India.
11:52	We thank the DWSIM team for making it as an open source software.
11:58	I want to thank you, the listener, for joining me in this tutorial. Goodbye.

Contributors and Content Editors

Nancyvarkey, PoojaMoolya, Pratik kamble, Sandhya.np14