Comparison between Down-Force and Drag Produced by a Legacy Spoiler VS a Spoiler with Tubercles (Humpback Whale Fin's Inspired)

Following data was obtained from Simulations carried out in SolidWorks Flow Simulation Premium.

Without Bumps
Air Speed in Km/h	Down Force in N	Drag in N
120	98.682	33.234
110	82.88	27.957
100	68.266	23.02
90	55.299	18.668
80	43.529	14.697
70	33.284	11.255
60	24.438	8.272
50	16.982	5.769
40	10.83	3.688
30	6.08	2.081
20	2.681	0.929
10	0.648	0.235

With Bumps
Air Speed in Km/h	Down Force in N	Drag in N
120	108.238	30.47
110	90.599	25.549
100	74.818	21.047
90	60.423	17.014
80	47.695	13.443
70	36.441	10.27
60	26.682	7.532
50	18.504	5.228
40	11.82	3.352
30	6.613	1.886
20	2.909	0.841
10	0.685	0.211

Comparison between Down Force and Drag

Air Speed in Km/h	Percentage Less Drag		Percentage More Down Force
120	8.32		8.83
110	8.61		8.51
100	8.57		8.76
90	8.86		8.48
80	8.53		8.73
70	8.75		8.66
60	8.95		8.41
50	9.38		8.23
40	9.11		8.38
30	9.37		8.06
20	9.47		7.84
10	10.21		5.4

It is clear that the spoiler with humpback whale's fin's inspired profile not only produce more down force at a particular velocity but also less drag.

Data for Spoiler without Humpback Whale's Fin's Inspired Bumps:

Wing Span: 100 cm

Chord Length: 17.5 cm

Air Velocity: 0-120 Km/h head on

Vertical Pitch: 22.5 Degree Downwards

Gravity Considered

Fluid: Dry Air at STP

Mesh Settings: Coarse (3/10)

Data for Spoiler with Humpback Whale's Fin's Bumps:

Wing Span: 100 cm

Chord Length Large: 17.5 cm

Chord Length Small: 15.75 cm

Air Velocity: 0-120 Km/h head on

Vertical Pitch: 22.5 Degree Downwards

Gravity Considered

Fluid: Dry Air at STP

Mesh Settings: Coarse (3/10)

Let's now take a look at visual representation of data.

This Plot Shows Air Velocity VS Drag, Down-Force by the Spoiler without Bumps

This Plot Shows Air Velocity VS Drag, Down-Force by the Spoiler with Bumps

As you can see from above two plots; the spoiler with the whale's fin like profile generates more down force and less drag.

This Plot Shows Air Velocity VS Down-Force Generated by the Spoilers

The green line represents the Down-Force generated by the spoiler with whale's fin's inspired design. It is around eight percent more at each velocity.

This Plot Shows Air Velocity VS Drag Generated by the Spoilers

The green line represents the Drag generated by the spoiler with whale's fin inspired design. It is around nine percent less at each velocity.

This Plot Shows Air velocity VS Down-Force to Drag Ratio

It is clear from this plot that Down-Force to Drag ratio is around sixteen percent more for whale's fin's inspired spoiler than the legacy one at each velocity.

This Plot Shows Air Flow Around the Spoiler without Bumps at 120 Km/h from the Right Side.

This Plot Shows Air Flow Around the Spoiler without Bumps at 120 Km/h.

This Plot Shows Air Flow Around the Spoiler with bumps at 120 Km/h.

This plot Shows Air Flow Around the Spoiler with bumps at 120 Km/h.

A simple stress analysis was carried out on both spoilers at 120 Km/h. FOS was greater than 1 for both cases.

Advantages of Spoilers:

The main benefit of installing a spoiler on a car is to help it maintain traction at very high speeds. Particularly at speeds around 90 Km/h. A car with a spoiler installed will be easier to handle at highway speeds. Rear spoilers such as the one's analysed in this study; push the back of the car down so the tires can grip the road better and increase stability. It also increases the braking ability of the car.

To build the prototypes and complete the study further, I need donations. To donate your part send an email to fadoobaba@live.com , tweet @fadoobaba, PM at https://www.facebook.com/ThreeDimensionalDesign orhttps://grabcad.com/fahad.rafi.butt or comment with your contact details and I will contact you!. Thank you for reading!

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Entry Level CPU Build Guide for Word Processing and Browsing; for October 2013 (Pakistan Market Prices and Parts Availability)

 

 

This is the least expensive, the most basic build guide, based on the parts available in Pakistan. This build is recommended for casual users and students wanting a basic computer for Microsoft® Office™ work. And for those who run games on consoles.

CPU

Intel® Pentium™ G-2020 Processor (3M Cache, up to 2.90 GHz) ~6,500 PKR, It has 2 cores and no HT technology, will perform everyday tasks like charm! It will struggle a with the running games at medium-low resolution. Just recommended for word processing and Internet.

Motherboard

Intel® Desktop Board DH61CR ~5,500 PKR, using 3rd party mother boards is not recommended in Pakistan because of no-warranty issues. Most of the importers buy from Intel and they come with warranty, others simply don't. This board supports 4 3 GB/s SATA, USB and PCI-e 2.1.

PSU + Case + Extra Fan

~3,000 PKR. For this build you can go for the built in 300 Watt power supply that comes with you casing, but due to large time spent gaming and/or rendering and due to hot temperature in Pakistan, the system heats up pretty bad, so be SURE to buy and add an extra 90 mm fan.

RAM

Kingston® KVR16N11/2 2 GB DDR 3 1600 MHz, ~2,000PKR  x1, as RAM is expensive these days, was at around half the price last year, so go for 1 DIMM 2 GB memory. (capacity of the recommended motherboard is 8GBx2 = 16 GB maximum).

HD

Seagate® Barracuda™ 7200 rpm 32 MB Cache 500 GB ~6,500 PKR. Buy the smallest/cheapest capacity/price available because most of us pre own portable hard drives anyway, use them for backup.

Optical Drive

Yeah, it was something too, something dinosaurs used! NOT recommended. Just wastage of money! We use USB ports to install any of the current OS, obviously. but of you don't have the ability to install the OS from USB port, or are afraid to make changes to your BIOS, please buy yourself a Super Drive.

WIFI

TP Link® WN722N ~1,000 PKR, it is a must as most of us have WIFI routers these days, so to get internet to your desktop, you will have to use this or a ~2,500 PKR 50+ meter LAN cable. The choice is yours! This isn't even a hard one!

This all adds up to 27,000 PKR without Graphics Card, Keyboard, Mouse, Speakers and a Monitor which most of us pre own and do not change for ~8-10 years.

If you are buying everything from start, add ~2,500 PKR for keyboard and mouse, and ~12,000 for 900p monitor (Dell® or HP® only because of warranty issues).

 

 

For suggestions, send an email to fadoobaba@live.com , tweet @fadoobaba, PM at https://www.facebook.com/ThreeDimensionalDesign or https://grabcad.com/fahad.rafi.butt or comment with your contact details and I will contact you!. Thank you for reading!

Do comment and share!

Haswell Powered CPU Build Guide for Low End Gaming, Word Processing and Browsing; for October 2013 (Pakistan Market Prices and Parts Availability)

This build is recommended for casual CAD users, rendering at very high resolution will take lot of time on this build, nearly impossible and very casual gamers.

CPU

Intel® Core™ i3-4130 Processor (3M Cache, up to 3.40 GHz) ~15,000 PKR, average rendering performance, it will stay for 3 years easy! It has 2 cores and HT technology, will perform everyday tasks and simple CAD tasks like charm! It will struggle a bit with the rendering software and large CAD assemblies, and of course running games at high resolution.

Motherboard

Intel® Desktop Board DB85FL ~10,000 PKR, using 3rd party mother boards is not recommended in Pakistan because of no-warranty issues. Most of the importers buy from Intel and they come with warranty, others simply don't. This board supports 4 6 GB/s SATA, USB and PCI-e 3.0.

PSU + Case + Extra Fan

~3,000 PKR. For this build you can go for the built in 300 Watt power supply that comes with you casing, but due to large time spent gaming and/or rendering and due to hot temperature in Pakistan, the system heats up pretty bad, so be SURE to buy and add an extra 120 mm fan.

RAM

Kingston® KVR16N11/4 4 GB DDR 3 1600 MHz, ~4,000PKR  x1, as RAM is expensive these days, was at around half the price last year, so go for 1 DIMM 4 GB memory. I don't recommend buying 2x DIMM of 2GB capacity, because if you want to upgrade to full capacity later (and most of you will, that's why one buys a Desktop and not a Craptop), (capacity of the recommended motherboard is 8GBx4 = 32 GB maximum) it will not use up extra DIMM slot.

HD

Seagate® Barracuda™ 7200 rpm 32 MB Cache 500 GB ~6,500 PKR. Buy the smallest/cheapest capacity/price available because most of us pre own portable hard drives anyway, use them for backup.

Optical Drive

Yeah, it was something too, something dinosaurs used! NOT recommended. Just wastage of money! We use USB ports to install any of the current OS, obviously. but of you don't have the ability to install the OS from USB port, or are afraid to make changes to your BIOS, please buy yourself a Super Drive.

WIFI

TP Link® WN722N ~1,000 PKR, it is a must as most of us have WIFI routers these days, so to get internet to your desktop, you will have to use this or a ~2,500 PKR 50+ meter LAN cable. The choice is yours! This isn't even a hard one!

This all adds up to 40,000 PKR without Graphics Card, Keyboard, Mouse, Speakers and a Monitor which most of us pre own and do not change for ~8-10 years.

If you are buying everything from start, add ~2,500 PKR for keyboard and mouse, and ~12,000 for 900p monitor (Dell® or HP® only because of warranty issues).

 

For suggestions, send an email to fadoobaba@live.com , tweet @fadoobaba, PM at https://www.facebook.com/ThreeDimensionalDesign or https://grabcad.com/fahad.rafi.butt or comment with your contact details and I will contact you!. Thank you for reading!

Do comment and share!

 

Haswell Powered CPU Build Guide for Medium Gaming and Entry Level CAD; for October 2013 (Pakistan Market Prices and Parts Availability)

 

This build is recommended for regular CAD users, rendering at very high resolutionwill take lot of time on this build. and casual gamers (which most of us are).

CPU

Intel® Core™ i5-4670 Processor (6M Cache, up to 3.50 GHz) ~22,000 PKR, exceptional value for money, average rendering performance, it will stay for 4 years easy! It has 4 cores and no HT technology, but will perform everyday gaming and CAD tasks like charm!

Motherboard

Intel® Desktop Board DB85FL ~11,000 PKR, using 3rd party mother boards is not recommended in Pakistan because of no-warranty issues. Most of the importers buy from Intel and they come with warranty, others simply don't. This board supports 4 6 GB/s SATA, USB and PCI-e 3.0.

GPU

MSI® NVidia™ GeForce GT 640 GDDR3 2 GB ~10,000 PKR, great value for money too, will easily run all existing games (~30 fps), and all to be released games at low-medium settings at a minimum of ~30 fps for at least 2 more years.

PSU + Case + Extra Fan

Corsair® VS 450 400 Watt PSU + Casing ~5,000 PKR (after the price for built-in PSU is subtracted). In Rendering, the CPU goes to full power and beyond (Intel® Turbo Boost) so power consumption increases, same applies to GPU when gaming, you will probably use 300 Watt maximum, but as PSU gets older (after 3-4 years minimum) the output wattage decrease, so to make up for that, initially buy a slightly larger wattage PSU. Also due to large time spent gaming and/or rendering, the system heats up pretty bad, so be SURE to buy and add an extra 90 mm fan.

RAM

Kingston® KVR16N11/8 8 GB DDR 3 1600 MHz, ~8,000PKR  x1, as RAM is expensive these days, was at around half the price last year, so go for 1 DIMM 8 GB memory. I don't recommend buying 2x DIMM of 4GB capacity, because if you want to upgrade to full capacity later (and most of you will, that's why one buys a Desktop and not a Craptop), (capacity of the recommended motherboard is 8GBx4 = 32 GB maximum) it will not use up extra DIMM slot.

HD

Seagate® Barracuda™ 7200 rpm 32 MB Cache 500 GB ~6,500 PKR. I don't recommend buying a hard disk anymore because it will slow your system down, buy a 180 GB SSD instead. Believe me, 180 GB is enough space, most of us pre own Portable HD anyway, so use that for back up. If you want a HD buy the smallest/cheapest capacity/price available.

Optical Drive

Yeah, it was something too, something dinosaurs used! NOT recommended. Just wastage of money! We use USB ports to install any of the current OS, obviously.

WIFI

TP Link® WN722N ~1,000 PKR, it is a must as most of us have WIFI routers these days, so to get internet to your desktop, you will have to use this or a ~2,500 PKR 50+ meter LAN cable. The choice is yours! This isn't even a hard one!

This all adds up to 70,000 PKR without SSD, Keyboard, Mouse, Speakers and a Monitor which most of us pre own and do not change for ~8-10 years.

If you are buying everything from start, add ~2,500 PKR for keyboard and mouse, and ~12,000 for 900p monitor (Dell® or HP® only because of warranty issues).

 

For suggestions, send an email to fadoobaba@live.com , tweet @fadoobaba, PM at https://www.facebook.com/ThreeDimensionalDesign or https://grabcad.com/fahad.rafi.butt or comment with your contact details and I will contact you!. Thank you for reading!

Do comment and share!

Haswell Powered CPU Build Guide for Hi-End Gaming and CAD; for October 2013 (Pakistan Market Prices and Parts Availability)

 

This build is recommended for those who use CAD software daily and render their models as well at a high resolution. And do PC gaming as well.

CPU

Intel® Core™ i7-4770 Processor (8M Cache, up to 3.90 GHz) ~34,000 PKR, exceptional value for money, excellent render performance, it will stay for 5 years easy! Comes with 8 cores! Do I need say more? :)

Motherboard

Intel® Desktop Board DH87MC ~12,000 PKR, using 3rd party mother boards is not recommended in Pakistan because of no-warranty issues. Most of the importers buy from Intel and they come with warranty, others simply don't. This board supports 6 6 GB/s SATA, USB and PCI-e 3.0.

GPU

MSI® NVidia™ GeForce GTX 650 GDDR5 2 GB ~15,000 PKR, great value for money too, will easily run all existing games (50+ fps), and all to be released games at maximum settings at a minimum of ~30 fps for at least 2 more years. And lets face it, AMD is crap! ;)

PSU + Case + Extra Fan

Corsair® VS 500 500 Watt PSU + Casing ~6,000 PKR (after the price for built-in PSU is subtracted). In Rendering, the CPU goes to full power and beyond (Intel® Turbo Boost) so power consumption increases, same applies to GPU when gaming, you will probably use 400 Watt maximum, but as PSU gets older (after 3-4 years minimum) the output wattage decrease, so to make up for that, initially buy a slightly larger wattage PSU. Also due to large time spent gaming and/or rendering, the system heats up pretty bad, so be SURE to buy and add an extra 120 mm fan.

RAM

Kingston® KVR16N11/8 8 GB DDR 3 1600 MHz, ~8,000PKR  x1, as RAM is expensive these days, was at around half the price last year, so go for 1 DIMM 8 GB memory. I don't recommend buying 2x DIMM of 4GB capacity, because if you want to upgrade to full capacity later (and most of you will, that's why one buys a Desktop and not a Craptop), (capacity of the recommended motherboard is 8GBx4 = 32 GB maximum) it will not use up extra DIMM slot.

HD

Seagate® Barracuda™ 7200 rpm 32 MB Cache 500 GB ~6,500 PKR. I don't recommend buying a hard disk anymore because it will slow your system down, buy a 180 GB SSD instead. Believe me, 180 GB is enough space, most of us pre own Portable HD anyway, so use that for back up. If you want a HD buy the smallest/cheapest capacity/price available.

SSD

Kingston® SV300S37A/60G 60 GB ~6,500PKR. This 6GB/s SSD boots Microsoft's® Windows™ 8.1 RTM in 10 seconds ONLY! Get the point I was making earlier? Go for Kingston because warranty issues, again importers do not buy from Intel in case of SSD, but from Corsair and Kingston.

Optical Drive

Yeah, it was something too, something dinosaurs used! NOT recommended. Just wastage of money! We use USB ports to install any of the current OS, obviously.

WIFI

TP Link® WN722N ~1,000 PKR, it is a must as most of us have WIFI routers these days, so to get internet to your desktop, you will have to use this or a ~2,500 PKR 50+ meter LAN cable. The choice is yours! This isn't even a hard one!

This all adds up to 89,000 PKR without Keyboard, Mouse, Speakers and a Monitor which most of us pre own and do not change for ~8-10 years. And with 60 GB SSD and 500 GB HD.

If you are buying everything from start, add ~2,500 PKR for keyboard and mouse, and ~12,000 for 900p monitor (Dell® or HP® only because of warranty issues).

 

For suggestions, send an email to fadoobaba@live.com , tweet @fadoobaba, PM at https://www.facebook.com/ThreeDimensionalDesign or https://grabcad.com/fahad.rafi.butt or comment with your contact details and I will contact you!. Thank you for reading!

Do comment and share!

SolidWorks Curtain Wall Railing with FEA

Curtain Wall

 

This is a CAD model of a curtain wall rail made in SolidWorks Premium 2013. It is a part and with steel as a material it weighs ~1,200 Kg. it is very useful in architecture projects. Stress analysis indicates that it can take UDL of 36,831 N vertical, with FOS of 4.88. This model is for sale.

 

Dimensions

Overall 15.167 ft. x 7.583 ft. x 10.167 ft.

Rail length 4 ft.

Rail height and width 2 in.

 

Pricing

SolidWorks 2013 Part File              $35 (PKR 3,500)

SolidWorks 2013 Part File              $85 (PKR 8,500) (with FEA data)
IGES/STEP File                             $90 (PKR 9,000)

STL File                                        $15 (PKR 1,500)

DWG File AutoCAD 2007                $25 (PKR 2,500)

DWG File AutoCAD 2013                $15 (PKR 1,500)

 

Renderings

With White Back Ground, 1366 x 626, 64 Ray Bounces, Maximum Shadow Quality, Ground Illumination, Global Illumination, Self Shadows, Ground Shadows and Ground Reflections.

 

$2.5 (PKR 250) Each (167 PPI at 9 in Diagonal) with at least 1 part file.

$10 (PKR 1,000) Each (167 PPI at 9 in Diagonal) only renders.

 

Custom Back Ground add $5 per render.

Special discount for students enrolled in degree programs!

Render 01

Render 02

Render 03

Render 04

 

 

SolidWorks RC Aircraft Model (Profile)

RC Aircraft Model (Profile)

 

This is another of my CAD models for sale, it is a profile of RC aircraft.

Special thing about it is that everything is designed to produce lift. The fuselage is also an airfoil. This can be great buy for you if you want to learn flow simulation over static flight surfaces using any software of your choice like SolidWorks Flow Simulation Premium 2011 and onwards, SIM 360, ANSYS etc. and then preform a stress analysis on them using the data from flow simulation at various AOA and velocities.

*Full scale structural model will be available for sale as soon as i finish it. :)

Pricing

SolidWorks 2011 Assembly Files      $100 (PKR 10,000)
SolidWorks 2013 Assembly Files      $85 (PKR 8,500)

IGES/STEP Files                             $200 (PKR 20,000)

STL File                                        $80 (PKR 8,000)

DWG File AutoCAD 2007                $50 (PKR 5,000)

DWG File AutoCAD 2013                $40 (PKR 4,000)

 

Renderings

With White Back Ground, 1366 x 626, 64 Ray Bounces, Maximum Shadow Quality, Ground Illumination, Global Illumination, Self Shadows, Ground Shadows and Ground Reflections.

 

$2.5 (PKR 250) Each (167 PPI at 9 in Diagonal) with at least 1 part file.

$10 (PKR 1,000) Each (167 PPI at 9 in Diagonal) only renders.

 

Custom Back Ground add $5 per render.

Special discount for students enrolled in degree programs!

 

Render 01

Render 02

Render 03

Render 04

Render 05