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 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 normalises 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	That is 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	I will 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 summarise 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 normalises when you press apply.
10:53	Go to the page where you defined mole fractions.
10:57	Check what the normalise 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 summarises 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