The construction industry is facing several challenges and drivers: access to qualified labour, rising material cost and margin squeeze are just a few.
Through the power of modelling and simulation, we can now significantly reduce the expense and time spent on developing and testing new drugs and medical devices.
High-tech is part of our daily lives, so much so that we take it for granted. We use mobile phones that are more powerful than the technology used to land a man on the Moon.
As every machine becomes connected to collect and transmit data, it’s important to know how to turn this opportunity into real value for your company and your customers.
We craft ships, a complex combination of technological systems, which must safely operate in a very hostile environment, keeping their precious cargo of people or goods safe.
Today, simulation software enables companies to optimize electric and hybrid vehicles, ADAS systems, and self-driving cars by exploring uncharted territories.
With Ansys Battery Simulation, you can achieve better performance, longer battery life, and reduced costs while accelerating the product development process.
One of the key applications of Fluent is in the field of combustion modelling, where it is used to model and optimize the combustion processes in various industries.
Heat exchangers have been used for many years in different applications. Typically we find them in HVAC, refrigeration, power generation, and chemical processing.
The mixing process is an integral component of the process industry, with a wide range of applications utilized to create tailored products that meet the diverse needs of various industries and customers.
Ansys Rotating Machinery application provides advanced software that assists in the design of various types of rotating machinery equipment and enables rapid iteration and improvement of designs.
The energy landscape of our world is currently undergoing a major transformation, towards more sustainable and environmentally-friendly energy sources.
With Neural Concept, design and verification workflow can be improved at least 2-10 times by training a Neural Network with existing data for designs and simulations.
Computational Fluid Dynamics (CFD) simulation products are for engineers who needs to make better and faster decisions and can help reducing the development time and efforts while improving your product’s performance and safety.
Materials information is crucial in engineering and manufacturing as it enables informed decisions. In simulation and modeling, precise materials data is needed to accurately predict real-world behaviour.
Ansys offers structural analysis software solutions that enable engineers of all levels and backgrounds to solve complex structural engineering problems faster and more efficiently.
As supplier of Digital Lab solutions it is natural for us to maintain a strong connection with academic institutions, students, teachers and researchers across the world.
Ansys Startup Program, provided by EDRMedeso, gives you full access to simulation software bundles that are built and priced to help entrepreneurs grow their business quickly and cost-effectively.
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During the COVID-19 crisis many governments has recommended, or even mandated by law, social distancing. The distance set by many is 1.5 m, but this is when all participants are stationary. How does moving participants affect this distance? Blocken et. al. in the Netherlands decided to have a look at this.
Most droplets coughed, sneezed or exhaled by a person will have fallen down before they have travelled 1.5 m, which is what informed the social distance. However, micro-droplets have very little inertia and when to people are walking or running in close proximity to each other the air flow patterns could carry these particles even beyond the 1.5 m.
For validation the group performed full scale CFD simulations with the same geometry of a runner that they had used for wind tunnel. They used a rectangular prism fluid domain and a poly-hexa-core mesh. They had a first layer height of 50 µm and 40 inflation layers in the boundary layer. The total cell count was about 6 million cells.
High-resolution computational grid on the runner and in the vertical centerplane.
Total cell count is about 6 millions cells.
At the inlet they specified 4 m/s, or a 4:10 km pace. To match the wind tunnel tests they assumed no head-, tail-, or crosswind. They ran SST turbulence model in Fluent 19.1 with the pseudo transient pressure-velocity coupling.
The validations came out favourably with a computed drag area for the runner of 0.301 m^2 while the measured value was 0.303 m^2.
For the study of the two runners they considered several configurations:
Side-by-side with a distance of 1 m
In line at distances of 1.5 m, 3 m, and beyond in steps of 1.5 m.
Same as above with increasing lateral distance of 1 m steps.
The geometry was the validation runner duplicated and the mesh settings were the same as for the validation case. Total cell count came to about 9 million cells.
Computational grid in vertical centerplane. Total cell count is about 9 millions cells.
The inlet velocity was the same 4 m/s except for the fast walking case where it was set to 1.11 m/s. The breathing velocity for the runners were set to 2.5 m/s, which represent moderately deep breathing. The saliva droplets were represented by water with a Rosin-Rammler droplet distribution and a minimum diameter of 40 µm, an average diameter 80 µm and a maximum diameter of 200 µm.
Droplet spreading when running at a speed of 14.4 km/h when (a,b) running behind each other; (c) side-by-side; (d) in staggered arrangement.
The above figure displays particles exhaled from the first runner and shows whether the second runner will end up in them as the lighter particles swirl around in the wake behind the first runner.
For walking speeds, a distance of about 5 m leads to no droplets reaching the torso of the trailing runner. For running the distance is about 10 m.
In conclusion, in order to have the same droplet exposure as two people standing still at 1.5 m, the social distance has to be increased to 5 m and 10 m for walking and running respectively. Any closer than this and any overtaking runner should move out of the slipstream in these windless conditions.