Related data of CG lightning attachment process
Data files
Dec 20, 2023 version files 15.50 MB
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1_The_3-D_plot_of_a_CG_lightning_simulated_by_an_improved_model.fig
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2.1_Scenario_A_-Multiple_upward_leaders_initiate_almost_simultaneously.fig
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2.2_Scenario_B_-The_second_leader_is_triggered_much_later_than_the_first_one.fig
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2.3_Scenario_C_-A_single_upward_leader_with_short_length_occurs_on_structure.fig
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2.4_Scenario_D_-The_structure_launches_only_one_long-length_upward_leader.fig
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3.1_A_3-D_CG_flash_event_with_two_leaders_and_its_2D_projection_onto_the_x-y_plane..fig
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3.2_The_variation_of_electric_field_at_four_top_corners_with_downward_leader_propagation.fig
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3.3_The_weight_distance_between_lightning_and_four_top_corners_varies_with_lightning_propagation.fig
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3.4_The_variation_of_electric_field_produced_by_positive_leader_with_its_length__and_the_propagation_direction_of_the_upward_leader.fig
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4_The_difference_in_the_average_weighted_distance_between_lightning_to_the_corners_with_the_fastest_and_second_fastest_increasing_electric_field_in_four_scenarios.fig
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5.1_Electric_field_change_at_four_top_corners_with_leader_extension_in_a_case.fig
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5.2_Electric_field_change_at_four_top_corners_with_leader_extension_in_another_case.fig
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6.1_The_effect_of_lightning_on_the_electric_fields_at_the_top_corners_in_four_scenarios.fig
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6.2_The_effect_of_upward_leader_on_the_electric_fields_at_the_top_corners_in_four_scenarios.fig
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7.1_Variation_of_electric_fields_at_the_top_corners_in_a_case_of_scenario_A.fig
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7.2_Variation_of_electric_fields_at_the_top_corners_in_a_case_of_scenario_B.fig
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7.3_Variation_of_electric_fields_at_the_top_corners_in_a_case_of_scenario_C.fig
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7.4_Variation_of_electric_fields_at_the_top_corners_in_a_case_of_scenario_D.fig
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8_The_distribution_of__the_time_interval_from_leader_initiation_to_final_jump_in_two_scenarios.fig
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9_The_computation_time_of_GPU_and_CPU_under_different_grid_and_iteration_accuracy.fig
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README.md
Abstract
More and more optical records have exhibited that multiple upward leaders (MULs) occur frequently on a structure in the flash attachment process. An interesting issue is why a structure can continue to launch an upward leader (UL) after the first one appears. This phenomenon is analyzed in the present paper. Considering the influence of the leader behaviors on the ambient electric field, an improved 3-D fine-resolution lightning attachment model with MULs is established to simulate cloud-to-ground flash events with diverse leader spatial morphologies. The simulation results show that MULs may initiate almost simultaneously or with an obvious delay and the variation range of UL length is large. From this, the flash events of lightning terminating on a structure are divided into four scenarios and each scenario is analyzed. It can be found that the spatial location of the downward leader, the length and propagation direction of the first UL and the time interval from the inception of the first UL to final jump significantly affect the electric fields at top corners of structure and further affect the inception of the second UL. Based on qualitative analysis, four factors are proposed to explain why the above four scenarios happen.
README: Related Data of CG Lightning Attachment Process
The dataset provided is a set of relevant rules diagrams for CG lightning in an isolated building, which is derived from simulation results using a three-dimensional high-resolution lightning attachment model. The dataset covers spatial three-dimensional behaviors of positive and negative leaders, changes in electric fields on isolated buildings, and factors related to multiple leader initiations. The content involves the three-dimensional behavior of positive and negative leaders, changes in electric field on an isolated building, and factors related to the inception of multiple upward leaders.
Description of the data and file structure
The dataset includes three-dimensional spatial plots, electric field diagrams, and relevant parameter graphs in fig file format. These files can be easily accessed using Matlab software.
Methods
The dataset provided is a set of relevant rules diagrams for CG lightning in an isolated building, which is derived from simulation results using a three-dimensional high-resolution lightning attachment model. The graphics were drawn using Matlab programming platform.
Usage notes
These data can be opened using Matlab.