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  • Arun k

    Hi,
    For a Project consultation/Discussion, I am looking for a Working professional only from Mechanical Engineering background. With at least 10+ years of experience.
    Person having experience on below two specialization will be good.
    R&D Mechanical.
    Pneumatic
    Expecting interests from Delhi/Ncr only.
    Interested people can connect me at 9873296355, arunniitian@gmail.com
    · 0 replies
  • Arun k

    Hi,
    For a Project consultation/Discussion, I am looking for a Working professional only from Mechanical Engineering background. With at least 10+ years of experience.
    Person having experience on below two specialization will be good.
    R&D Mechanical.
    Pneumatic
    Expecting interests from Delhi/Ncr only.
    Interested people can connect me at 9873296355, arunniitian@gmail.com
    · 0 replies
  • Wahyu Sudrajadd

    hahaha hello world
     
    · 0 replies
  • Avis

    in order to perform VBscripting how much should a person be aware of the knowledgeware work benches. should he know the general functions of knowledgeware or should he be well versed in it?
    · 0 replies
  • Maity Arindam

    Hay users. please give me some suggestions about this pdf !!! This is my project and I have to add something .. please give me some suggestions to add something and rewrite again this topic ..
    Arindam_project_1 pdf.pdf
    · 1 reply

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      Mechanical Design and More

       

      Why Design?

      The new era is flooded with products - Virtual or Physical. And with no surprise, everything needs to be designed. We are doing it from long back, since we are bringing something new or may be inventing. Design is the medium which brings your thoughts into a physical (nowadays virtual) form.
       

      Virtual/Web design

      Remember the old days websites or software packages - They were largely comprised of text, and design layout did not exist much. While later versions had some design, they were still extremely basic, consisting mainly of tags for headers, paragraphs, and links. Visual considerations such as typography, imagery, and navigation were still things of the not-too distant future.
       
      vDoIT_Ui-ux.png
      pc: www.vdoit.in
       
      And now, we are into a new age where we look forward to User Interface and User Experience (UI/UX) designers to improve overall experience and usability of webisites and software packages.
       
      There is a whole world behind these two words!!
       
      Just take an example of one of the largest social networking website, Facebook - Who decides, where will be your cover pic and where should be the display pic be located in your wall. Not only this, there are whole lot of stuffs on each and every website. Simple placement and positions of the buttons will change the overall experience of the user. This is where UI/UX designer are working hard by understanding human nature and behavior of doing things when they are 'online'.
       
      uiuxusability.jpg
      pc: www.mockingbot.com

       

       
      Just to add, each and every thing which you look into a website, software package or mobile applications , be it a logo, buttons, stickers and the entire range of interface details which you see are being designed by someone - Designers. Imagine the vast amount of work involved in this!

       


      Physical/Mechanical design

      Being a Mechanical Design Engineer, this excites me more.
       
      When I say "Mechanical", does it restricts me to gears, bolts-nuts, cam-shaft, car/aerospace bodies and parts?
       
      Well not at all !
       
      Name a product around you which you think is not of 'mechanical' genre - Mobile phones, Television (its remote too), Refrigerators, Air conditioners and many more. Most of us would say these are electronics/electrical products. They are listed under 'Electronics' category in amazon and flipkart too.

       
       
       TV-fridge.jpg

      Now, understand this - All of these products are obviously being invented/reinvented by electrical or electronics engineers and their functionality depends on basic rules and principles of these engineering discipline, but their actual physical being is a work of physics and mathematics. When I say physics and mathematics, its basically mechanical design in broader sense.

      For instance, the electronic board inside a mobile phone or TV is work of electronics ( circuit design, voltage calculations, etc), but they never tell how the mobile phone should look or feel to the end user when they will hold it. Also, electrical engineer can not tell how a TV to be wall mounted, what should be the screen thickness, corners, etc. In more engineering sense, the entire design is actually work of a Mechanical Design engineer who designs the fits/forms and the look of the appliance. Obviously when I say 'look', it opens a whole new world which revolves around aesthetics.  Probably, I will talk about ergonomics and aesthetics some other time.

       

      The Design Sense

      Any design needs to fulfill certain requirements which comes from end users. But the real question is what inspires a designer to design something new or may be modify an existing product to something new and more usable. The designer must satisfy all what is required by the user and obviously the standards set upon it (and off course the laws of physics and mathematics). These all might drive the design and product structure but these can never drive how the product will look or feel to the user. At some instances the user might not be interested on how it looks, it should perform and that's all counts.
      Design.png
      pc: www.api-university.com

      The design sense of the designer plays an important role on how the product is being designed and what features are built to satisfy all the requirements. Be it a UI/UX designer or Mechanical designer, designing under requirements are achievable like solving a problem but developing a design sense is something which comes with time and experience. In a way its a work of art.
      design%2Bsense.png
      ps: www.designschool.canva.com

      How do we develop a design sense?

      When I say DESIGN is work of art, any art comes with time and needs passion. We may learn design tools but the design sense needs dedication. A musician can learn how to play a guitar but can only develop new tunes if he is passionate about it.
       
      Have you ever thought why a particular product is being made/designed the way it is? Let me take a few examples:
       
      1. Bulbs - The iconic shape that blazes in our minds as the quintessential light bulb served two purposes in the advent of lighting: it was easily manufactured using glass-blowing techniques, and its spherical shape was best for controlling heat and light emissions.
      bulb.jpg
       
       
      2. Golf balls - Are a golf ball's dimples just there for aesthetics?
      Try aerodynamics - They actually create turbulence in the layer of air surrounding a ball in flight, reducing the drag behind the ball.
       
      golfball.png
       
      Now we know why helmets for cyclists are designed with dimples. But why not aircraft or cars?

       
      helmet.jpg
      3. Manhole covers - Why they are always round?
      They are round almost all over the world, so that they cannot possibly fall through their own holes. Any shape other than a circle would be able to fit through in at least one way.
       
      manhole1.jpg
       
      Off course few designers took it as challenge, but I am sure they had to make some arrangement, may be a hatch.
       
      square_manhole.jpg
       
      So now you know why certain features are designed in these products and why it was a sensible approach.

      I will discuss a lot more about design - Design thinking, mechanical design approach and the process to build something new and off course the tools which are used. Log in to 

      Why Design?

      The new era is flooded with products - Virtual or Physical. And with no surprise, everything needs to be designed. We are doing it from long back, since we are bringing something new or may be inventing. Design is the medium which brings your thoughts into a physical (nowadays virtual) form.

      Virtual/Web design

      Remember the old days websites or software packages - They were largely comprised of text, and design layout did not exist much. While later versions had some design, they were still extremely basic, consisting mainly of tags for headers, paragraphs, and links. Visual considerations such as typography, imagery, and navigation were still things of the not-too distant future.
       
      vDoIT_Ui-ux.png
      pc: www.vdoit.in
       
      And now, we are into a new age where we look forward to User Interface and User Experience (UI/UX) designers to improve overall experience and usability of webisites and software packages.
       
      There is a whole world behind these two words!!
       
      Just take an example of one of the largest social networking website, Facebook - Who decides, where will be your cover pic and where should be the display pic be located in your wall. Not only this, there are whole lot of stuffs on each and every website. Simple placement and positions of the buttons will change the overall experience of the user. This is where UI/UX designer are working hard by understanding human nature and behavior of doing things when they are 'online'.
       
      uiuxusability.jpg
      pc: www.mockingbot.com
       
       
      Just to add, each and every thing which you look into a website, software package or mobile applications , be it a logo, buttons, stickers and the entire range of interface details which you see are being designed by someone - Designers. Imagine the vast amount of work involved in this!
       


      Physical/Mechanical design

      Being a Mechanical Design Engineer, this excites me more.
       
      When I say "Mechanical", does it restricts me to gears, bolts-nuts, cam-shaft, car/aerospace bodies and parts?
       
      Well not at all !
       
      Name a product around you which you think is not of 'mechanical' genre - Mobile phones, Television (its remote too), Refrigerators, Air conditioners and many more. Most of us would say these are electronics/electrical products. They are listed under 'Electronics' category in amazon and flipkart too.

       
       
       TV-fridge.jpg

      Now, understand this - All of these products are obviously being invented/reinvented by electrical or electronics engineers and their functionality depends on basic rules and principles of these engineering discipline, but their actual physical being is a work of physics and mathematics. When I say physics and mathematics, its basically mechanical design in broader sense.
      For instance, the electronic board inside a mobile phone or TV is work of electronics ( circuit design, voltage calculations, etc), but they never tell how the mobile phone should look or feel to the end user when they will hold it. Also, electrical engineer can not tell how a TV to be wall mounted, what should be the screen thickness, corners, etc. In more engineering sense, the entire design is actually work of a Mechanical Design engineer who designs the fits/forms and the look of the appliance. Obviously when I say 'look', it opens a whole new world which revolves around aesthetics.  Probably, I will talk about ergonomics and aesthetics some other time.

      The Design Sense

      Any design needs to fulfill certain requirements which comes from end users. But the real question is what inspires a designer to design something new or may be modify an existing product to something new and more usable. The designer must satisfy all what is required by the user and obviously the standards set upon it (and off course the laws of physics and mathematics). These all might drive the design and product structure but these can never drive how the product will look or feel to the user. At some instances the user might not be interested on how it looks, it should perform and that's all counts.
      Design.png
      pc: www.api-university.com

      The design sense of the designer plays an important role on how the product is being designed and what features are built to satisfy all the requirements. Be it a UI/UX designer or Mechanical designer, designing under requirements are achievable like solving a problem but developing a design sense is something which comes with time and experience. In a way its a work of art.
      design%2Bsense.png
      ps: www.designschool.canva.com

      How do we develop a design sense?

      When I say DESIGN is work of art, any art comes with time and needs passion. We may learn design tools but the design sense needs dedication. A musician can learn how to play a guitar but can only develop new tunes if he is passionate about it.
       
      Have you ever thought why a particular product is being made/designed the way it is? Let me take a few examples:
       
      1. Bulbs - The iconic shape that blazes in our minds as the quintessential light bulb served two purposes in the advent of lighting: it was easily manufactured using glass-blowing techniques, and its spherical shape was best for controlling heat and light emissions.
      bulb.jpg
       
       
      2. Golf balls - Are a golf ball's dimples just there for aesthetics?
      Try aerodynamics - They actually create turbulence in the layer of air surrounding a ball in flight, reducing the drag behind the ball.
       
      golfball.png
       
      Now we know why helmets for cyclists are designed with dimples. But why not aircraft or cars?

       
      helmet.jpg
      3. Manhole covers - Why they are always round?
      They are round almost all over the world, so that they cannot possibly fall through their own holes. Any shape other than a circle would be able to fit through in at least one way.
       
      manhole1.jpg
       
      Off course few designers took it as challenge, but I am sure they had to make some arrangement, may be a hatch.
       
      square_manhole.jpg
       

      So now you know why certain features are designed in these products and why it was a sensible approach.

      I will discuss a lot more about design - Design thinking, mechanical design approach and the process to build something new and off course the tools which are used.

       

      Mechanical Design and More

       

       

    1. 58c0e1facf9a1_EffectofthetypeofmeshonaPipeflowproblem.thumb.jpg.1fdd8a463decca9320342da21a339a2f.jpg
       
       
      The project explains how the type of mesh can influence the results obtained for the mixing of flow in a pipe. The simulation is done on a cloud-based CAE platform called SimScale. The link to the project is here. This project is a part of the SimScale Professional Training on CFD (Computational Fluid Dynamics).
       
      ab25ab48061159.588d8513e593a.jpg
      The pipe flow geometry, originally uploaded by the SimScale Staff, available in the public projects.
       
      For this internal flow problem, a Hex-dominant parametric mesh is used. Two types of meshes are created for the problem - a coarse mesh ( which accommodates all the features of the geometry) and a fine mesh ( by increasing the fineness).
       
      d54ec048061159.588d8513e5e65.jpg
      Coarse mesh ( Fineness: 1-Very coarse)
       
      55c7a048061159.588d8513e635a.jpg
      Fine mesh ( Fineness : 4-Fine)
       
      The same type of analysis is performed for both the meshes (Fluid dynamics: Incompressible). Same boundary conditions and simulation controls are defined for both the meshes.
       
      53db0b48061159.588d8513e6863.jpg
      Simulation run: Coarse mesh
       
      c66e3948061159.588d8513e74ed.jpg
      Simulation run: Fine mesh
       
      The simulation results are post-processed (clip filter is used) to get the contour plot of the velocity flow field.
       
      ae485f48061159.588d8513e7a41.jpg
      Post-processor screenshot for coarse mesh
       
      d8894448061159.588d8513e8008.jpg
      Post-processor screenshot for fine mesh
       
      As revealed by the results the fines mesh captures specific physics (like flow separation and vorticities) more accurately. Isn't that expected? Well, not always!
       
       
       
      This blog was previously posted on Behance.

       

       

       

       

       

       

       

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      Recent Entries

      boiler.thumb.jpg.e337153387408b1c1d3b910b196ba2ea.jpg

      • The boiler system comprises a feed-water system, steam system, and fuel system. The feed-water system supplies treated water to the boiler and regulate it automatically to meet the steam demand. Various valves and controls are provided to access for maintenance and monitoring.
      • The steam system heats and vaporizes the feed water and controls steam produced in the boiler. Steam is directed through a piping system to the application. Throughout the system, steam pressure is regulated using valves and monitored with steam pressure gauges.
      • The fuel system consists of all equipment used to supply of fuel to generate the necessary heat. The equipment required in the fuel system depends on the type of fuel used in the system.

      Boilers Classification:

      There are a large number of boiler designs, but boilers can be classified according to the following criteria:

      1. According to Relative Passage of water and hot gases:

      • Water Tube Boiler: A boiler in which the water flows through some small tubes which are surrounded by hot combustion gases, e.g., Babcock and Wilcox, Stirling, Benson boilers, etc.
      • Fire-tube Boiler: The hot combustion gases pass through the boiler tubes, which are surrounded by water, e.g., Lancashire, Cochran, locomotive boilers, etc.

      2. According to Water Circulation Arrangement:

      • Natural Circulation: Water circulates in the boiler due to density difference of hot and water, e.g., Babcock and Wilcox boilers, Lancashire boilers, Cochran, locomotive boilers, etc.
      • Forced Circulation: A water pump forces the water along its path, therefore, the steam generation rate increases, Eg: Benson, La Mont, Velox boilers, etc.

      3. According to the Use:

      • Stationary Boiler: These boilers are used for power plants or processes steam in plants.
      • Portable Boiler: These are small units of mobile and are used for temporary uses at the sites.
      • Locomotive: These are specially designed boilers. They produce steam to drive railway engines.
      • Marine Boiler: These are used on ships.

      4. According to Position of the Boilers:

      • Horizontal, inclined or vertical boilers

      5. According to the Position of Furnace

      • Internally fired: The furnace is located inside the shell, e.g., Cochran, Lancashire boilers, etc.
      • Externally fired: The furnace is located outside the boiler shell, e.g., Babcock and Wilcox, Stirling boilers, etc.

      6. According to Pressure of steam generated

      • Low-pressure boiler: a boiler which produces steam at a pressure of 15-20 bar is called a low-pressure boiler. This steam is used for process heating.
      • Medium-pressure boiler: It has a working pressure of steam from 20 bars to 80 bars and is used for power generation or combined use of power generation and process heating.
      • High-pressure boiler: It produces steam at a pressure of more than 80 bars.
      • Sub-critical boiler: If a boiler produces steam at a pressure which is less than the critical pressure, it is called as a subcritical boiler.
      • Supercritical boiler: These boilers provide steam at a pressure greater than the critical pressure. These boilers do not have an evaporator and the water directly flashes into steam, and thus they are called once through boilers.

      7. According to charge in the furnace.

      • Pulverized fuel,
      • Supercharged fuel and
      • Fluidized bed combustion boilers.
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