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

{| Border=1
| <center>'''Time'''</center>
| <center>'''Narration'''</center>

|-
| 00:00
| Welcome to the '''spoken tutorial''' on '''creating a material stream in DWSIM'''.

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| 00:05
|My name is Kannan Moudgalya.

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| 00:07
| In this tutorial, we are going to learn:

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| 00:10
| How to select chemical components

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| 00:14
| How to choose a thermodynamic package

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| 00:17
| How to choose units and values

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| 00:19 
| And how to specify a material stream.

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| 00:23
| To record this tutorial, I am using '''DWSIM 3.4''' windows version.

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| 00:29
|But this process is identical in '''Linux''', '''Mac OS X '''and '''FOSSEE '''on '''ARM'''.

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| 00:35
| To practice this tutorial, you should have access to''' DWSIM'''.

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| 00:39
| Let us start with creating a new '''steady state simulation'''.

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| 00:46
|When '''DWSIM''' is opened, you see a startup window, such as this.
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| 00:53
| Click on '''Create new simulation'''

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| 00:57
|If a simulation wizard appears, cancel it.

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| 01:02
|On the top left, locate a field called '''Simulation'''.

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| 01:08
| Hover the mouse over the puzzle like button next to it.

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| 01:14
| You can see that it is known as '''Configure Simulation'''.

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| 01:18
|Press this button.

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| 01:23
| A '''Configure Simulation''' pop-up opens.

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| 01:26
|In some earlier versions, this pop-up opened automatically.

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|01:31
| The lettering is very small and unreadable in this recording.

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| 01:35
|To address this, I will zoom in on the relevant portion of this screen only.

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| 01:42
|I have now rearranged the screen for better readability.

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| 01:46
| In the '''Component Search''' tab of this window, type "benzene".

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| 01:59
|'''Benzene '''appears in two rows. We are interested in the entry that has''' DWSIM''' as the database.

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| 02:07
|We will explain in another tutorial the significance of other databases.

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| 02:13
| Double click anywhere on this line.

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| 02:17
| You could have pressed the '''Add''' button also which is on the right hand side which we will see shortly.

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| 02:23
|You can see that''' Benzene '''is now selected.

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| 02:27
|I shall let you see it by shifting the pop-up window to the left.

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| 02:40
| Repeat this for '''toluene'''.

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| 02:52
|Let us select this. Let us add.

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| 02:59
|You can see that the component selection is completed.

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|03:04
|I shall shift the window back to where it was.

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| 03:12
| We are now ready to choose '''Thermodynamics'''.

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| 03:14
| Let us go back to the slides.

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| 03:18
|Let us go to the next slide.

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| 03:21
| This slide has guidelines on how to choose '''thermodynamics'''.

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| 03:24
|Covering the theory behind this slide is beyond the scope of this tutorial.

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|03:30
|As '''Benzene''' and '''Toluene''' form an ideal solution, we can choose '''Raoult's law'''.

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| 03:35
| Let us do this in '''DWSIM'''.

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| 03:40
|Locate the '''Thermodynamics''' tab on the left hand side. Click on it.

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| 03:47
|A sub-menu appears in the white space above.

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| 03:51
| Click on the '''Property Packages''' in the sub-menu.

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| 03:56
| Scroll down in this list and locate an option called '''Raoult's law'''.

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| 04:03
|Choose this by double clicking on it.

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| 04:08
| You will see '''Raoult's law''' appearing on the right hand side of the '''pop-up'''.

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| 04:12
|To see this, let me shift the pop-up to the left.

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| 04:20
| On the lower right hand corner of this pop-up, locate a button called '''Back to Simulation.''' Click on it.

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| 04:28
| The configure simulation pop-up gets closed and we are ready to do the simulation.

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| 04:35
| The '''canvas''' at the centre of this page is used to create '''flowsheet'''s.

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| 04:41
|We will now create a '''material stream'''.

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| 04:44
| On the right hand side, you see an '''object palette'''.

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| 04:49
|It has a large collection of many useful chemical engineering objects.

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| 04:55
|You can scroll it and see what all are available.

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| 05:01
| Right at the top of this is the '''Material Stream''' object. Click it and drag it to the '''flowsheet'''.

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| 05:12
| At the desired place, remove your finger from the mouse to drop the '''stream'''.

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| 05:19
|You may leave it anywhere on this canvas.

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| 05:21
|You can also move the stream to another place later, if required.

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| 05:25
| Immediately after dropping the stream, a pop-up to enter compositions appears.

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| 05:31
|Notice that '''Mole Fraction '''is selected by default.

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| 05:36
|You can choose one of the other possibilities. But, I shall leave it as it is.

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| 05:42
| The chemicals that we already selected, appear here automatically.

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| 05:49
| Type''' 0.5''' in the '''Equilibrium composition''' of '''Toluene'''.

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| 05:55
|Press down-arrow.

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| 05:57
| Type '''0.5''' in the '''Equilibrium Composition''' of '''benzene'''.

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|06:02
|Click '''Apply'''.

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| 06:06
| The total of the '''mole fractions''' appears on the right hand side.

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| 06:12
|If the total is not 1, '''DWSIM ''''''normalize'''s the entries, so that the total becomes 1.

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| 06:19
|But this may give some unpredictable values at times.

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| 06:22
|So, you yourself may want to ensure that the total comes to 1. Click the''' Close''' button.

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| 06:31
| You can always get back to the previous pop-up by double clicking on the '''stream'''.

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| 06:36
| Below the '''configure simulation''' button, notice a place to change the '''System of Units'''.

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| 06:43
|Let us click this menu and choose '''CGS System'''.

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| 06:49
| Let us now complete the specification of this stream.

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| 06:52
|Click on the '''stream''' icon in the flowsheet once; do not double-click it.

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| 07:00
| On the left hand side of the '''flowsheet''', you will see the selected object window.

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| 07:07
|This window consists of '''Properties '''and '''Appearance''' tabs.

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| 07:12
| The '''properties''' tab shows all the properties of the '''stream'''. '''DWSIM '''assigns default values to all properties.

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| 07:21
| Let us first scroll up this page.

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| 07:27
|There are many ways to complete the specification of a '''material stream'''.

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| 07:31
| Press on '''Specification'''.

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| 07:34
| A down-arrow appears on the right hand side, press it.

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| 07:40
| The default is to specify '''pressure and temperature'''. 

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| 07:43
|I shall leave it as it is.

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| 07:45
| I shall press the down-arrow once again to close the menu.

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| 07:50
| We see the number 25 already entered against the temperature.

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| 07:55
|By hovering the '''mouse''' over the '''Temperature,''' we see the '''unit'''s as degree Celsius.

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| 08:02
| Let us click to the right of this number.

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| 08:07
|It is an editable '''field'''. Let me delete it and enter '''30'''.

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| 08:15
| Let us look at '''pressure''' next. I shall leave it at '''1''' atmosphere.

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| 08:23
| Let us specify the '''flowrate''' next.

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| 08:26
|We can specify-''' mass flowrate '''or''' molar flowrate '''or '''volumetric flowrate'''.

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| 08:33
| We will specify '''molar flowrate'''.

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| 08:38
|I shall delete the old value and enter '''100'''.

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| 08:47
| Press '''Enter''' to save this change.

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| 08:50
| Units for this '''field''' are '''moles per second''' as we can see now.

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| 08:56
|It is possible to use a combination of units such as '''CGS '''and '''SI'''.

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| 09:01
| We will postpone this discussion to another tutorial.

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| 09:05
|Now the '''stream''' is fully defined.

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| 09:08
| '''DWSIM''' has given the name '''MSTR-004''' to this stream automatically.

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| 09:16
| You may see some other name in your '''simulation''', but do not worry about it.

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| 09:21
|As I am not happy with this automatically generated name, let me change it.

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| 09:27
| Under the selected '''Object''' window, click on the '''Appearance''' tab.

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| 09:33
|The '''Appearance''' tab is used to modify the visual appearance of the stream.

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| 09:37
| Click on the blank space beside '''Name''' and type ''' Inlet1''', after deleting this.

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| 09:55
|Click on the '''Name''' again.

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|09:58
| You can see the name '''Inlet1''' appearing below this stream in the flowsheet.

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| 10:04
|We will build on this '''material stream''' in the upcoming tutorials.

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| 10:08
| Let us go back to the slides.

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| 10:13
|We go to the next slide.

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|10:15
| Let me summarize what we learnt in this tutorial.

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| 10:19
|We defined a material stream.

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| 10:22
|Chose chemical components.

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| 10:24
|Chose the property estimation package.

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| 10:27
|Completed specifications.

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| 10:29
|Assigned values and units.

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| 10:32
|Specified '''temperature''', '''pressure''' and''' flow rate.'''

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| 10:36
|Pointed out many different options.

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| 10:40
| I would like to give some assignments now.

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| 10:43
|Choose '''Benzene''' and '''Toluene''' mole fractions that do not add up to 1.

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| 10:48
|Check how '''DWSIM '''normalizes when you press '''Apply'''.

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| 10:53
| Go to the page where you defined '''mole fractions.'''

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| 10:57
|Check what the '''normalize''' button does when the total is not 1.

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| 11:02
| Go to the page where we defined the '''molar flow rate'''.

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| 11:05
|'''DWSIM''' automatically displays equivalent''' flow rates''' in other units.

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| 11:11
|Check if these values are consistent.

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| 11:16
| Create a stream consisting of '''Benzene, Toluene '''and '''Xylene.'''

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| 11:20
|Carry out the previous assignments for this stream also.

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| 11:26
|This brings us to the end of this tutorial.

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| 11:28
| This video summarizes the '''Spoken Tutorial''' project.

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| 11:33
|If you do not have good bandwidth, you can download and watch it.

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| 11:39
| We conduct workshops using Spoken Tutorials; give certificates. Please contact us.

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| 11:47
| The Spoken Tutorial project is funded by NMEICT, MHRD, Govt. of India.

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| 11:52
| We thank the DWSIM team for making it as an open source software.

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| 11:58
|I want to thank you, the listener, for joining me in this tutorial. Goodbye.

|}