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CFD (Computational fluid dynamics) TITLES 1. Flow control over airfoils using different shaped dimples 2. Analysis of flow field across blunt fin with dimples –experimentation 3. Aerodynamic characteristic and flow pattern on dimples structure of a sphere 4. Numerical flow simulation for aircraft 5. Analysis of surface augmentation of airfoil sections via flow visualization techniques 6. Experimental and numerical investigations of a high performance co-flow jet airfoil 7. Modelling & implementation of aerodynamic zero-lift drag into adapdt 8. Cfd analysis on the main-rotor blade of a scale helicopter model using overset meshing 9. Investigation of different airfoils on outer sections of large rotor blades 10. Analysis of foils and wings operating at low reynolds numbers 11. A computational study of the clap and fling aerodynamic mechanism 12. Aeroelastic analysis of aircraft with control surfaces using cfd effects of winglets on a first-generation jet transport wing 13. Aerodynamic analysis of the use of multi-winglets in light aircrafts 14. Drag analysis of an aircraft wing model with and without bird feather like winglet 15. Aerodynamic analysis of a blended-wing-body aircraft configuration 16. Drag reduction in aircraft model using elliptical winglet 17. Experimental investigation on the effect of multi-winglets 18. Aerodynamic analysis of multi-winglets for low speed aircraft 19. Aerodynamic efficiency study of modern spiroid winglets near-field tip vortex behind a swept wing model 20. Analytic and experimental investigation of three-winglets 21. Aerodynamics of wingtip sails 22. Performance analysis of a wing with multiple winglets 23. Cfd analysis of winglets at low subsonic flow 24. The design of winglets for low-speed aircraft 25. Design of multiple winglets to improve turning and soaring characteristics of angelo d’arrigo’s hangglider 26. Numerical study of wingtip shed vorticity reduction by wing boundary layer control 27. Numerical simulation of missile 28. Heat transfer studies on blunt body at hypersonic speeds 29. Simulation of flow over a wedge 30. Design and develop a vortex generator based on boundary layer theory 31. Designing and simulating flow across axisymmetric inlet 32. Flow inside a vortex tube 33. Horizontal tail analysis (2-seat amphibious airplane) 34. Analysis of the z-wing configuration 35. Numerical analysis of injectors in rocket propellant 36. Design and analysis of ramjet engine 37. Cfd analysis of thrust vector control in nozzle 38. Numerical investigation of aero spike nozzle 39. Aerodynamic design study of ground vehicles 40. Cfd analyses of ship hull forms 41. Cfd prediction of loads on marine structures 42. Design and analysis of a radial turbine with back swept blaring 43. Evaluation of cfd sub-models for the intake manifold port flow analysis 44. A vehicle body drags analysis using computational fluid dynamics 45. Cfd calculation of convective heat transfer coefficients and validation 46. A study of computational fluid dynamics applied to room air flow 47. Cfd analysis of airflow and temperature distribution in buildings 48. Assessment of turbulence modeling for cfd 49. Cfd analysis of diffuser 50. Cfd analysis of engine valve 51. Nozzle design optimization for to reduce noise for turbo jet engine. 52. Air and fuel flow interaction in combustion chamber for various injector locations 53. Cfd investigation of airflow on a santro zing car by using fluent 54. Cfd analysis of rocket nozzle 55. Cfd analysis of supersonic exhaust in a scramjet engine 56. aerodynamic design for bus/car vehicle 57. Cfd analysis of exhaust manifold 58. Cfd analysis of centrifugal fan 59. Cfd analysis of intake manifold in si engines 60. Cfd modeling of the automobile catalytic converter 61. Cfd analysis of fluid flow and heat transfer in a single tube-fin arrangement of an automotive radiator 62. Computational flow field analysis of a vertical axis wind turbine 63. Cfd analysis of mixed flow pump impeller 64. Cfd analysis of flow through venture meter to determine the coefficient of discharge 65. Design improvements on mixed flow pumps by means of computational fluid dynamics 66. Turbulent flow simulation in kaplan draft tube 67. Flow analysis of marine propeller 68. Design and analysis of globe valve as control valve using cfd software 69. Numerical analysis of wax melting 70. Conjugate heat transfer analysis in electronics devices
  • 2016-06-21T04:15:55

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Introduction to the Neo4j Graph Database: Neo4j is a graph database. A graph database, instead of having rows and columns has nodes edges and properties. It is more suitable for certain big data and analytics applications than row and column databases or free-form JSON document databases for many use cases. A graph database is used to represent relationships. The most common example of that is the Facebook Friend relationship as well as the Like relationship. You can see some of that in the graphic below from Neo4j. The circles are nodes. The lines, called edges, indicate relationships. And the any comments inside the circles are properties of that node. graphic source: Neo4j We write about Neo4j here because it has the largest market share. There are other players in this market. And according to Neo4J, Apache Spark 3.0 will add the Neo4j Cypher Query Language to allow and make easier “property graphs based on DataFrames to Spark.” Spark already supports GraphX, which is an extension of the RDD to support Graphs. We will discuss that in another blog post. In another post we will also discuss graph algorithms. The most famous of those is the Google Page Rank Index. Algorithms are the way to navigate the nodes and edges. Costs? Is Neo4J free? That’s rather complicated. The Community Edition is. So is the desktop version, suitable for learning. The Enterprise edition is not. That is consistent with other opensource products. When I asked Neo4J for a license to work with their product for an extended period of time they recommended that I use the desktop version. The Enterprise version has a 30-day trial period. There are other alternatives in the market. The key would be to pick one that has enough users so that they do not go out of business. Which one should you use? You will have to do research to figure out that. Install Neo4J You can use the Desktop or tar version. Here I am using the tar version, on Mac. Just download it and then start up the shell as shown below. You will need a Java JDK, then. export JAVA_HOME='/Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home' Start the server and set the initial password then open cypher-shell. The default URL is a rather strange looking bolt://localhost:7687. cd neo4j bin folder neo4j-admin set-initial-password xxxxxx ./cypher-shell -a bolt://localhost:7687 -u neo4j -p xxxxx Create a Single Node Thing of a node as a circle or an object, in the picture above. It can optionally have properties or a label or both. Below is the simplest way to create a node. (Note that you have to end each command cypher command with a semicolon.) This node has nothing attached to it, meaning no properties or labels. It only has a variable, n, which you can use in other operations. What all of this means will become clear in subsequent steps. create (n); 0 rows available after 13 ms, consumed after another 0 ms Added 1 nodes Cyper SQL is what Neo4j calls their command language. When you run a command it does not return any value unless you add the return keyword. In this example, as before, we create a node with nothing in it. Neo4j creates a variable, which we have called x, to represent that object which we can then return using the return statement, so that we can see it or use it in subsequent operations. create(x) return x ; +----+ | x | +----+ | () | +----+ Create Multiple Nodes You can create more than one node at a time: create (o), (p); 0 rows available after 13 ms, consumed after another 0 ms Added 2 nodes Create a Node with a Label A label is like the node name, or think of it as a type. Below is node with label Student. Labels have colons (:) in front of them. As before, s is just a variable. It’s scope is the life of the shell. Close the shell and the variable goes away. create (s:Student); 0 rows available after 16 ms, consumed after another 0 ms Added 1 nodes, Added 1 labels You can create nodes with more than one label: create (s:Student:Biology) return s; In addition to a label, a node can have properties, given as JSON: CREATE (x:Employees { name: 'Walker', title: 'Tech Writer' }) CREATE (y:Employees { name: 'Stephen', title: 'Manager' }) return x, y; Create a Relationship The syntax for creating a relation is strange looking. Below, this example relationship is called BOSS. The r in front of it is just a variable. And the arrow shows the direction. You can use ->, <-, or – to indicate direction. Since it is complicated to remember direction you might want to use the – (dash), meaning both directions, in really complex models if direction does not matter. That’s a design decision. Below is how to create a relationship. We say in this example that Stephen is the BOSS of Walker. The MATCH statement is like the SQL select. It gives the selection criteria which shows which two elements should be connected to each other. And here we use x and y as temporary variables. As you can see they let you use shorthand notation in subsequent statements, using the variable name instead of the :label. MATCH (x:Employees), (y:Employees) WHERE y.name = "Stephen" AND x.name = "Walker" CREATE (x)-[r:BOSS]->(y) RETURN type(r); Now, we carry the logic in the opposite direction. If Stephen is Walker’s boss then Walker works for Stephen. So we can make Walker EMPLOYEEOF Stephen. We can use any descriptive name, like EMPLOYEEOF. MATCH (x:Employees), (y:Employees) WHERE y.name = "Stephen" AND x.name = "Walker" CREATE (y)-[r:EMPLOYEEOF]->(x) RETURN type(r); Create Multiple Relationships Here we give another example Here we have a model of drugs, what they are used for, and who makes them. Create some data and then create the relationships. Pay attention to the output as if you make a mistake and the MATCH statement finds no data then the relationship will have no data too. In other words it should say Create n nodes or Created n relationships, where n > 0. CREATE (x:Cancers { name: 'skin'}); CREATE (x:Drugs { name: 'interferon'}); CREATE (x:Pharmacy { name: 'Acme Drugs'}); MATCH (a:Cancers), (b:Drugs) WHERE a.name = 'skin' AND b.name = 'interferon' CREATE (a)-[rp:PROTOCOL]->(b), (b)-[rt:TREATS]->(a); MATCH (a:Pharmacy), (b:Drugs) WHERE a.name = 'Acme Drugs' AND b.name = 'interferon' CREATE (a)-[r:MAKES]->(b); Here we make relationships in both directions, making two relationships at once. Notice that the b and a swap positions to show which belongs to which. We could also have pointed the arrow in the opposite direction. MATCH (a:Cancers), (b:Drugs) WHERE a.name = 'skin' AND b.name = 'interferon' CREATE (a)-[rp:PROTOCOL]->(b), (b)-[rt:TREATS]->(a); Querying Here we illustrate further how MATCH works. First we list all nodes with label Pharmacy. MATCH (p:Pharmacy) return p; +----------------------------------+ | p | +----------------------------------+ | (:Pharmacy {name: "Acme Drugs"}) | +----------------------------------+ Now we show all relationships of Pharmacies that make Drugs. MATCH (p:Pharmacy)-[r:MAKES]->(b:Drugs) return p, b; +------------------------------------------------------------------+ | p | b | +------------------------------------------------------------------+ | (:Pharmacy {name: "Acme Drugs"}) | (:Drugs {name: "interferon"}) | +------------------------------------------------------------------+
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