The most significant feature of the body is theĢ50, 350 angle of rear slant. The rear of the body to study the separation phenomena at 250,ģ50 angles, and a rectangular box, which connects the front and Made up of a round front part, a movable slant plane placed in (simplified car body) as ground vehicle is considered which isĬommonly used as test case in industry. Vehicle is analysed and coefficient of drag is calculated usingĬFD (Ansys Fluent). ThisĪnalysis is used to understand the fuel consumption, stability of Used to find the parameter in the automobile industry. This study demonstrated that the mesh decimating algorithm is promising to simply CTMs that is not only able to reduce considerable computational cost but capable of maintain an acceptable predictive error.Ībstract- The CFD (Computational Fluid Dynamics) analysis is
This is especially true when contaminants are released from the CTMs. For densely occupied indoor spaces such as a train cabin, the error induced by CTM simplification could be enlarged and further cause significant global error to the prediction of contaminant transport. Comparison of the predicted airflow field against the published data in the literature demonstrated that CTM simplification has a strong effect on the thermal airflow field prediction in the vicinity of manikin surfaces. In this study, six CTMs including a 3D scanned CTM and five simplified CTMs generated from various simplification approaches were employed to analyse the impact of CTM simplification on the prediction of airflow field and contaminant transport. While simplified computational thermal manikins (CTMs) are widely employed in CFD modes of occupied indoor spaces in order to save the computational cost, a criterion of simplification is still absent and the effects of CTM simplification are yet not clear. The spatial and temporal characteristics of the particle dispersion and concentration showed that higher walking speed was conducive to reducing human's exposure to contaminants in breathing region. The residual flow disturbances after the manikin stopped moving continued to induce the particle to spread and deposit over time. The airflow momentum induced by the moving body disturbed PM2.5 particles that were initially at rest on the floor to lift and become re-suspended due to its interaction with the trailing wake. The significant airflow patterns included: an upward-directed flow in front of the body combined with a high velocity downward-directed flow at the rear of the body a stagnant region behind the gap between the legs and counter-rotating vortices in the wake region.
Dont wake the dragon meme series#
A series of numerical simulations of three walking speeds were performed to compare the flow disturbance induced by the walking motion. Particle transport from the floors and its re-dispersion was tracked by a Lagrangian approach.
Dont wake the dragon meme update#
The manikin motion was achieved by a dynamic layering mesh method to update new grids with each time step. The impact of human-induced wake flow and particle re-dispersion from floors in an indoor environment was investigated by performing computational fluid dynamics simulations with dynamic mesh of a moving manikin model in a confined room. For duet running, we reveal the optimum duet-running formation where a following runner behind a pacemaker experiences small air resistances or strong drafts. For solo running, we reveal an increase in air resistance of more than 10% in comparison with the conventional result with no moving-belt system.
Following, using this the developed moving-belt system, we investigate the air resistance on a runner in solo running and in duet running. As a result, we have confirmed the effective improvement of the velocity distributions in terms of flow uniformity and turbulence reduction, especially near the moving-belt surface. In the present study, we develop a moving-belt system, and show its basic performance, such as the distributions of time-mean flow velocity and turbulent intensity above the moving-belt using a hot-wire anemometer. Wind-tunnel experiments are the most effective approaches both to elucidate the flows around runners in track-and-field athletics, and to evaluate their air resistances.
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